Raising an exception while using REST shows the whole stack trace

1. Install Nuxeo 8.10
2. Install ffischer-8-rest-test.zip package
3. copy jar file event-test-project-core-1.0-SNAPSHOT.jar
4. Start server
5. create a document of type myDoc
6. retrieve its id by exporting it as XML for example
7. try to modify it through rest:

   curl -u Administrator:Administrator -H "Content-Type: application/json" -X PUT http://localhost:8080/nuxeo/api/v1/id/beed4b9d-611e-4e0d-b46a-ac3fe5afc53a -d '{
           "entity-type": "document",
           "repository": "default",
           "uid": "4fe2843b-298c-42dd-bc32-4180ee521761",
           "properties": {
               "dc:title": "The new title",
               "dc:description": "Attempt to update through REST API"
           }
       }'

8. this returns the full stack of the exception
9. setting the parameter org.nuxeo.rest.stack.enable to false does not change the behavior
10. the same could be observed in a unit test by trying the JsonFactoryManager.toggleStackDisplay method

After checking with dev in a debug session, this is due to the following code in JsonWebengineWriter:

if (jsonFactoryManager.isStackDisplay()
                || MediaType.valueOf(MediaType.APPLICATION_JSON + "+nxentity").equals(mediaType)) {

When raising the exception, at some point the type is changed from application/json to application/nx+entity thus falsing the above condition.