Intermittent failures in EE resource injection tests

The set of 5 failures shown below are recurring intermittently in the WF testsuite:

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org.jboss.as.test.integration.ee.injection.resource.enventry

EnvEntryInjectionTestCase.testNonExistantResourceCannotBeLookedUp
org.jboss.as.test.integration.ee.injection.resource.noncomponent

NonComponentResourceInjectionTestCase.testBindingDoesNotExist

org.jboss.as.test.integration.ee.injection.resource.persistencecontextref

PersistenceContextRefTestCase.testCorrectPersistenceUnitInjectedFromAnnotation2
PersistenceContextRefTestCase.testCorrectPersistenceUnitInjectedFromPersistenceUnitRef
PersistenceContextRefTestCase.testCorrectPersistenceUnitInjectedFromRefInjectionTarget2