Jandex WARNING using standard JAX-RS classes
**Describe the bug**
This is not a real bug but an annoying WARNING if you use classes like javax.ws.rs.core.StreamingOutput:

```
    @GET
    @Path("other")
    @Produces(MediaType.TEXT_HTML)
    public StreamingOutput renderGWTHostingPage() {

        return output -> output.write("hello".getBytes(Charset.defaultCharset()));
    }

``` 

**Expected behavior**
No WARNING

**Actual behavior**
This is printed on the console at startup:
```
[WARNING] [io.quarkus.deployment.steps.ReflectiveHierarchyStep] Unable to properly register the hierarchy of the following classes for reflection as they are not in the Jandex index:
	- javax.ws.rs.core.StreamingOutput
Consider adding them to the index either by creating a Jandex index for your dependency via the Maven plugin, an empty META-INF/beans.xml or quarkus.index-dependency properties.");.

```

**To Reproduce**
Steps to reproduce the behavior:
1. mvnw compile quarkus:dev

**Environment (please complete the following information):**
 - Darwin WMICTLM1P.local 18.7.0 Darwin Kernel Version 18.7.0: Sat Oct 12 00:02:19 PDT 2019; root:xnu-4903.278.12~1/RELEASE_X86_64 x86_64
 - openjdk version "1.8.0_232"
OpenJDK Runtime Environment (build 1.8.0_232-20191009173705.graal.jdk8u-src-tar-gz-b07)
OpenJDK 64-Bit GraalVM CE 19.3.0 (build 25.232-b07-jvmci-19.3-b05, mixed mode)
 - <quarkus.platform.version>1.2.0.Final</quarkus.platform.version>
[quarkus-120-issues.zip](https://github.com/quarkusio/quarkus/files/4142463/quarkus-120-issues.zip)


**Additional context**
Please use the reproducer project.

diff --git a/extensions/resteasy-common/deployment/src/main/java/io/quarkus/resteasy/common/deployment/ResteasyDotNames.java b/extensions/resteasy-common/deployment/src/main/java/io/quarkus/resteasy/common/deployment/ResteasyDotNames.java
index 6f491912bce..c4f1a454b00 100644
--- a/extensions/resteasy-common/deployment/src/main/java/io/quarkus/resteasy/common/deployment/ResteasyDotNames.java
+++ b/extensions/resteasy-common/deployment/src/main/java/io/quarkus/resteasy/common/deployment/ResteasyDotNames.java
@@ -74,6 +74,7 @@ private boolean isInIgnoredPackage(String name) {
             // JAX-RS
             DotName.createSimple("javax.ws.rs.core.Response"),
             DotName.createSimple("javax.ws.rs.container.AsyncResponse"),
+            DotName.createSimple("javax.ws.rs.core.StreamingOutput"),
 
             // RESTEasy
             DotName.createSimple("org.jboss.resteasy.plugins.providers.multipart.MultipartInput"),
['extensions/resteasy-common/deployment/src/main/java/io/quarkus/resteasy/common/deployment/ResteasyDotNames.java']