Recurring failure of EJBSignEncryptMultipleClientsTestCase.encryptedAndSignedRequestFromJohn

Since https://github.com/wildfly/wildfly/pull/6660 was submitted, EJBSignEncryptMultipleClientsTestCase.encryptedAndSignedRequestFromJohn is failing regularly. Not every time but very often.

Alessio, you mentioned seeing some error logging from XAResourceRecoveryImpl, but that's in the logs on successful runs as well, and occurs prior to the test as well. That's a period background task from the transaction manager trying to perform recovery of some previous transaction. I don't see why it would have any impact on this test.