These tests fail intermintently on really slow machines.
To reproduce, try to run in EC2 on 32-bit "small" instance type.
https://jenkins-jbossqa.rhcloud.com/job/EAP6-EC2/

org.jboss.as.test.xts.simple.wsat.client.WSATTestCase.testCommit
org.jboss.as.test.xts.simple.wsat.client.WSATTestCase.testRollback
org.jboss.as.test.xts.simple.wsba.coordinatorcompletion.client.WSBACoordinatorCompletionTestCase.testSuccess
org.jboss.as.test.xts.simple.wsba.coordinatorcompletion.client.WSBACoordinatorCompletionTestCase.testCancel
org.jboss.as.test.xts.simple.wsba.participantcompletion.client.WSBAParticipantCompletionTestCase.testSuccess
org.jboss.as.test.xts.simple.wsba.participantcompletion.client.WSBAParticipantCompletionTestCase.testCancel