Clean up generics a bit
ISPN-4951 Entry Retriever iterator should rethrow caused exception

* Pass along any local throwable to iterator
* If remote node receives throwable propagate that as a response
ISPN-4982 EntryRetriever doesn't filter and convert activated values
properly
ISPN-4985 MBean Server Builder for JCache TCK moved to main jar

* Removed home-grown CDI bean provider for JCache TCK, instead use
the harness library provided by the spec.
ISPN-4137 Transaction executed multiple times due to forwarded CommitCommand

Make rollback commands synchronous
Move stuff from AbstraceEnlistmentAdapter to TransactionCoordinator.