Since JTA is not required to be supported in ACC and GlassFish does not support
JTA in ACC, an application client can not use container managed entity manager
in GlassFish. This implies, an application client can not use
@PersistenceContext to inject an entity manager as that is used to inject a
container manager entity manager. Verifier would like to report such use as a
failure. Currently annotation processor ignores this annotation. We need an
error (using ErrorHandler framework) from annotation processor when it
encounters @PersistenceContext in an appclient.