TomEE 8 Jsonb Provider

[Roberto Cortez]

Hi,
I was wondering if it will be ok to add the Johnzon Jsonb Provider to the 
default providers list? The dependency is already in the project, it was just 
commented out with a "java 8 only". I guess this was pre TomEE 8.
If this is ok, here is a PR that uncomments the dependency and add the 
org.apache.johnzon.jaxrs.jsonb.jaxrs.JsonbJaxrsProvider in the providers list.
Cheers,Roberto