Added some helper notes and a test to show the common cause of shouldMerge shouldAlter shouldAdd and shouldReplace

Conflicts:
	ArjunaJTS/jtax/src/test/resources/jbossts-properties.xml
Amended comment as to possible causes of OBJECT_NOT_EXIST during should* in ExtendedResourceRecord
Added a unit test to verify that commit on a suspended AtomicAction is allowed
Amended test showing how XA_RDONLY causes should* to work around optimization
Fix unit tests that were not using jts TransactionManagerImple