JBTM-1702 make same change to JTS variant for XA_RB* out of XAR::end in onePhaseCommit
[JBTM-2110] Make JTSRemote_PerfTest more configurable
JBTM-2164 Update to use the cut command to get the jboss-as version
Added new threading hammer test.

Also tidied up comment.
https://issues.jboss.org/browse/JBTM-2088

Updated test to reflect some docs examples.