MULE-6577: Failure to propagate the correlation ID across JMS queues

- Minor changes to the test case.

(cherry picked from commit 481f4ce6f2b97f479a382730d383ffa3a158086f)
(cherry picked from commit 8bbfff883db2098665aef32b4d99fe650d3a5431)
(cherry picked from commit bd47327bf3356b86e6efa05740d4eae9bd9aa189)