MODE-2353 Fixed the Infinispan tx listener in case multiple writer threads are active

ok, checked the JTA 1.2 spec:
>3.1User Transaction Interface
The UserTransaction.begin method starts a global transaction and associates the transaction with the calling thread. The transaction-to-thread association is managed transparently by the transaction manager.

so I guess these are not needed, because the code change ensures that 1 listener will always process 1 transaction and therefore should only execute processing code off 1 thread.