Create Media Does Not Work with Standalone Media URL
https://github.com/mjordan/islandora_workbench/blob/3590667e460fb6fed3a0d64ca2a15103cf1cfd1b/workbench_utils.py#L3348C8-L3348C46

will result in the whole routine failing if `standalone_media_url` is `true` in the configuration file.  We could instead replace this with

`media_endpoint_path = '/entity/media?_format=json' if config['standalone_media_url']  else '/entity/media'`
diff --git a/workbench_utils.py b/workbench_utils.py
index f7e066e..5123875 100644
--- a/workbench_utils.py
+++ b/workbench_utils.py
@@ -3345,7 +3345,7 @@ def create_media(config, filename, file_fieldname, node_id, csv_row, media_use_t
                 media_track_field_data[0]['default'] = True
                 media_json[media_track_field_name_parts[2]] = media_track_field_data
 
-        media_endpoint_path = '/entity/media'
+        media_endpoint_path = '/entity/media?_format=json' if config['standalone_media_url']  else '/entity/media'
         media_headers = {
             'Content-Type': 'application/json'
         }
['workbench_utils.py']