PersistenceContextInjectionTest is using an invalid isOpen() call

org.jboss.jsr299.tck.tests.implementation.simple.resource.persistenceContext.PersistenceContextInjectionTest:

The Java EE resource producer field pattern is tested by a couple of methods. During the test, the EntityManager.isOpen() method is used for testing, but calling isOpen() from within the test method is invalid, because the EntityManager is transaction-scoped and not application-managed, and the call happens outside the scope of a JTA transaction.

Proposed solution: inject the produced EM in an EJB and perform the check from within a transaction.