Changed assertions to use test framework assertions
Fixed SKIP_REMOTE_STORE to only mean when persisting entries
ISPN-4820 Change Size method on Cache to return the contents of the
entire cluster

* SizeCommand now uses entry iterator
ISPN-4137 Transaction executed multiple times due to forwarded CommitCommand

Make rollback commands synchronous
Move stuff from AbstraceEnlistmentAdapter to TransactionCoordinator.