org.infinispan.transaction.tm.DummyTransaction and I can't find out to make the change. According to that link it recommends not using the DummyTransactionManager.
DummyTransactionManagerLookup : This provides with a dummy transaction manager which should only be used for testing. Being a dummy, this is not recommended for production use a it has some severe limitations to do with concurrent transactions and recovery.
It doesn't look like there is native support for this in the standalone.xml file. Is this the case?