Created by: mppperez
Related to several issues for Java JAXRS and non working withXml configuration option.
This PR only fixes it for jaxrs-spec and only for enum and pojo (no more needed in our project and could not be tested).
Any help with extending for other jaxrs implementations are welcome - I will update this PR.
Otherwise this may be already a help for ppl with similar issues that can't find any other pointers on how to fix this in OpenAPI for their project.