JUnit test supporting https://issues.apache.org/jira/browse/AMQ-4493

Chained request/reply pattern as described in https://issues.apache.org/jira/browse/AMQ-4493.

Bug does not seem to be in stompjms, rather in the STOMP adaptation in ActiveMQ.
Bug present in both 5.8.0 and 5.7.0

![jmx tree before assert](https://f.cloud.github.com/assets/1487862/452711/a416fe98-b2f8-11e2-9718-8adb98833319.png)