https://issues.apache.org/jira/browse/AMQ-5431 - prevent NPE when a Detach frame is received for a
 link that didn't get as far as setting a context during creation before being
 detached/closed
https://issues.apache.org/jira/browse/AMQ-5456

Apply patch from gemmellr to ensure that TX messages accepted retain the
TX state until commit.
https://issues.apache.org/jira/browse/AMQ-5457 - fix and test - we now peek first in redeliveredWaitingDispatch
Implements https://issues.apache.org/jira/browse/AMQ-5458
https://issues.apache.org/jira/browse/AMQ-5447

shutdown the scheduled executer so that any scheduled tasks are canceled
and removed on stop.
https://issues.apache.org/jira/browse/AMQ-5436

Add support for temp topics and queues to perf tests.  This closes #49
https://issues.apache.org/jira/browse/AMQ-5442

Add check to avoid any NPE from stop without start called.