JBTM-1429 Document the PartcipantCompletion race condition
JBTM-1031. == replaced with equals() in objects comparison where appropriate
Merge branch '4.17-JBTM-1429_Document_the_PartcipantCompletion_race_condition' of git://github.com/paulrobinson/narayana into paulrobinson-4.17-JBTM-1429_Document_the_PartcipantCompletion_race_condition
JBTM-1432 Updated to print out the UID of the transaction we are completing or registering a sync on in the error message