Quarkus fails to report a correct exception when conflicting authentication mechanisms are used (was Quarkus: can't verify Auth0 token)
### Describe the bug

I have the following OIDC configuration:
```
quarkus.oidc.auth-server-url=https://cognio.eu.auth0.com
quarkus.oidc.client-id=<redacted>
quarkus.oidc.credentials.secret=<redacted>
quarkus.oidc.token.audience=<redacted>
quarkus.oidc.authentication.scopes=openid,profile,email

quarkus.http.auth.permission.authenticated.paths=/*
quarkus.http.auth.permission.authenticated.policy=authenticated
```

While trying to access any endpoint with a valid access token I receive following response:
```
HTTP/1.1 401 Unauthorized
www-authenticate: Bearer
content-length: 0
```

If logging level is set to DEBUG the following stack trace is printed:
```
2021-07-28 14:47:08,037 DEBUG [io.sma.jwt.aut.principal] (vert.x-eventloop-thread-7) SRJWT08019: AuthContextInfo is: JWTAuthContextInfo{publicVerificationKey=null, secretVerificationKey=null, privateDecryptionKey=null, secretDecryptionKey=null, issuedBy='null', expGracePeriodSecs=60, maxTimeToLiveSecs=null, publicKeyLocation='null', publicKeyContent='null', decryptionKeyLocation='null', decryptionKeyContent='null', jwksRefreshInterval=60, tokenHeader='Authorization', tokenCookie='null', alwaysCheckAuthorization=false, tokenKeyId='null', tokenDecryptionKeyId='null', tokenSchemes=[Bearer], requireNamedPrincipal=true, defaultSubClaim='null', subPath='null', defaultGroupsClaim='null', groupsPath='null', signatureAlgorithm=RS256, keyEncryptionAlgorithm=RSA_OAEP, keyFormat=ANY, expectedAudience=null, groupsSeparator=' ', relaxVerificationKeyValidation=true, verifyCertificateThumbprint=false}
2021-07-28 14:47:08,040 DEBUG [io.sma.jwt.aut.principal] (vert.x-eventloop-thread-7) SRJWT08005: Verification key is unresolvable
2021-07-28 14:47:08,040 DEBUG [io.qua.sma.jwt.run.aut.MpJwtValidator] (vert.x-eventloop-thread-7) Authentication failed: io.smallrye.jwt.auth.principal.ParseException: SRJWT07000: Failed to verify a token
	at io.smallrye.jwt.auth.principal.DefaultJWTTokenParser.parseClaims(DefaultJWTTokenParser.java:164)
	at io.smallrye.jwt.auth.principal.DefaultJWTTokenParser.parse(DefaultJWTTokenParser.java:56)
	at io.smallrye.jwt.auth.principal.DefaultJWTCallerPrincipalFactory.parse(DefaultJWTCallerPrincipalFactory.java:31)
	at io.smallrye.jwt.auth.principal.DefaultJWTParser.parse(DefaultJWTParser.java:60)
	at io.smallrye.jwt.auth.principal.DefaultJWTParser_Subclass.parse$$superforward1(DefaultJWTParser_Subclass.zig:517)
	at io.smallrye.jwt.auth.principal.DefaultJWTParser_Subclass$$function$$6.apply(DefaultJWTParser_Subclass$$function$$6.zig:33)
	at io.quarkus.arc.impl.AroundInvokeInvocationContext.proceed(AroundInvokeInvocationContext.java:54)
	at io.quarkus.arc.runtime.devconsole.InvocationInterceptor.proceed(InvocationInterceptor.java:62)
	at io.quarkus.arc.runtime.devconsole.InvocationInterceptor.monitor(InvocationInterceptor.java:51)
	at io.quarkus.arc.runtime.devconsole.InvocationInterceptor_Bean.intercept(InvocationInterceptor_Bean.zig:521)
	at io.quarkus.arc.impl.InterceptorInvocation.invoke(InterceptorInvocation.java:41)
	at io.quarkus.arc.impl.AroundInvokeInvocationContext.perform(AroundInvokeInvocationContext.java:41)
	at io.quarkus.arc.impl.InvocationContexts.performAroundInvoke(InvocationContexts.java:32)
	at io.smallrye.jwt.auth.principal.DefaultJWTParser_Subclass.parse(DefaultJWTParser_Subclass.zig:1180)
	at io.smallrye.jwt.auth.principal.DefaultJWTParser_ClientProxy.parse(DefaultJWTParser_ClientProxy.zig:298)
	at io.quarkus.smallrye.jwt.runtime.auth.MpJwtValidator$1.accept(MpJwtValidator.java:53)
	at io.quarkus.smallrye.jwt.runtime.auth.MpJwtValidator$1.accept(MpJwtValidator.java:49)
	at io.smallrye.context.impl.wrappers.SlowContextualConsumer.accept(SlowContextualConsumer.java:21)
	at io.smallrye.mutiny.operators.uni.builders.UniCreateWithEmitter.subscribe(UniCreateWithEmitter.java:22)
	at io.smallrye.mutiny.operators.AbstractUni.subscribe(AbstractUni.java:36)
	at io.smallrye.mutiny.operators.uni.UniOnItemTransformToUni.subscribe(UniOnItemTransformToUni.java:25)
	at io.smallrye.mutiny.operators.AbstractUni.subscribe(AbstractUni.java:36)
	at io.smallrye.mutiny.operators.uni.UniOnItemTransformToUni.subscribe(UniOnItemTransformToUni.java:25)
	at io.smallrye.mutiny.operators.AbstractUni.subscribe(AbstractUni.java:36)
	at io.smallrye.mutiny.operators.uni.UniMemoizeOp.subscribe(UniMemoizeOp.java:76)
	at io.smallrye.mutiny.operators.AbstractUni.subscribe(AbstractUni.java:36)
	at io.smallrye.mutiny.groups.UniSubscribe.withSubscriber(UniSubscribe.java:50)
	at io.quarkus.vertx.http.runtime.security.HttpSecurityRecorder$2.handle(HttpSecurityRecorder.java:104)
	at io.quarkus.vertx.http.runtime.security.HttpSecurityRecorder$2.handle(HttpSecurityRecorder.java:51)
	at io.vertx.ext.web.impl.RouteState.handleContext(RouteState.java:1127)
	at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:151)
	at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:133)
	at io.quarkus.vertx.http.runtime.devmode.VertxHttpHotReplacementSetup$3.handle(VertxHttpHotReplacementSetup.java:88)
	at io.quarkus.vertx.http.runtime.devmode.VertxHttpHotReplacementSetup$3.handle(VertxHttpHotReplacementSetup.java:77)
	at io.vertx.core.impl.future.FutureImpl$3.onSuccess(FutureImpl.java:124)
	at io.vertx.core.impl.future.FutureBase.lambda$emitSuccess$0(FutureBase.java:54)
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: org.jose4j.lang.UnresolvableKeyException: SRJWT07003: Failed to load a key from null
	at io.smallrye.jwt.auth.principal.AbstractKeyLocationResolver.reportLoadKeyException(AbstractKeyLocationResolver.java:180)
	at io.smallrye.jwt.auth.principal.KeyLocationResolver.<init>(KeyLocationResolver.java:47)
	at io.smallrye.jwt.auth.principal.DefaultJWTTokenParser.getVerificationKeyResolver(DefaultJWTTokenParser.java:236)
	at io.smallrye.jwt.auth.principal.DefaultJWTTokenParser.parseClaims(DefaultJWTTokenParser.java:99)
	... 42 more
Caused by: java.lang.NullPointerException
	at io.smallrye.jwt.util.ResourceUtils.getResourceStream(ResourceUtils.java:68)
	at io.smallrye.jwt.util.ResourceUtils.readResource(ResourceUtils.java:44)
	at io.smallrye.jwt.auth.principal.AbstractKeyLocationResolver.readKeyContent(AbstractKeyLocationResolver.java:131)
	at io.smallrye.jwt.auth.principal.KeyLocationResolver.initializeKeyContent(KeyLocationResolver.java:95)
	at io.smallrye.jwt.auth.principal.KeyLocationResolver.<init>(KeyLocationResolver.java:45)
	... 44 more
```

### Expected behavior

Quarkus should successfully verify token and give access to endpoint.

### Actual behavior

Quarkus throws exception.

### How to Reproduce?

Steps to reproduce:

1. Create free Auth0 tenant.
2. Create new API application with RSA256 signing algorithm.
3. Add `http://localhost:8080/` to allowed callback URLs for the API application.
4. Rewrite redacted values from configuration with the corresponding API application properties.
5. Start service.

### Output of `uname -a` or `ver`

_No response_

### Output of `java -version`

11.0.12

### GraalVM version (if different from Java)

_No response_

### Quarkus version or git rev

2.0.3.Final

### Build tool (ie. output of `mvnw --version` or `gradlew --version`)

Apache Maven 3.8.1 (05c21c65bdfed0f71a2f2ada8b84da59348c4c5d)

### Additional information

_No response_
diff --git a/extensions/oidc/runtime/src/main/java/io/quarkus/oidc/runtime/OidcAuthenticationMechanism.java b/extensions/oidc/runtime/src/main/java/io/quarkus/oidc/runtime/OidcAuthenticationMechanism.java
index f3ec0c42821..1fdcbe9a246 100644
--- a/extensions/oidc/runtime/src/main/java/io/quarkus/oidc/runtime/OidcAuthenticationMechanism.java
+++ b/extensions/oidc/runtime/src/main/java/io/quarkus/oidc/runtime/OidcAuthenticationMechanism.java
@@ -9,6 +9,7 @@
 
 import io.quarkus.oidc.OIDCException;
 import io.quarkus.oidc.OidcTenantConfig;
+import io.quarkus.oidc.common.runtime.OidcConstants;
 import io.quarkus.security.identity.IdentityProviderManager;
 import io.quarkus.security.identity.SecurityIdentity;
 import io.quarkus.security.identity.request.AuthenticationRequest;
@@ -79,6 +80,6 @@ public Set<Class<? extends AuthenticationRequest>> getCredentialTypes() {
     public HttpCredentialTransport getCredentialTransport() {
         //not 100% correct, but enough for now
         //if OIDC is present we don't really want another bearer mechanism
-        return new HttpCredentialTransport(HttpCredentialTransport.Type.AUTHORIZATION, "bearer");
+        return new HttpCredentialTransport(HttpCredentialTransport.Type.AUTHORIZATION, OidcConstants.BEARER_SCHEME);
     }
 }
diff --git a/extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/security/HttpCredentialTransport.java b/extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/security/HttpCredentialTransport.java
index 935f19193e9..cd3ba29798c 100644
--- a/extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/security/HttpCredentialTransport.java
+++ b/extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/security/HttpCredentialTransport.java
@@ -26,7 +26,7 @@ public HttpCredentialTransport(Type transportType, String typeTarget) {
     public HttpCredentialTransport(Type transportType, String typeTarget, String authenticationScheme) {
         this.transportType = Objects.requireNonNull(transportType);
         this.typeTarget = Objects.requireNonNull(typeTarget).toLowerCase();
-        this.authenticationScheme = Objects.requireNonNull(authenticationScheme);
+        this.authenticationScheme = Objects.requireNonNull(authenticationScheme).toLowerCase();
     }
 
     public enum Type {
['extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/security/HttpCredentialTransport.java', 'extensions/oidc/runtime/src/main/java/io/quarkus/oidc/runtime/OidcAuthenticationMechanism.java']