This is for the JAXRPC API piece of WFLY-16579.

I don't want to move the entire EJB3 subsystem code to jakarta.* in the next week, so to resolve this I'll split the subsystem's SessionContextImpl class into a package protected abstract base class with 99% of the code, and then SessionContextImpl will extend that with the one method that needs the JAXRPC API. In the WFP source-transform variant of ejb3 I'll override that SessionContextImpl and remove the method. With that the JAXRPC API module will not be needed in WFP.