JtaTransactionManager's configuration options for a TransactionSynchronizationRegistry are now in sync with the options for UserTransaction/TransactionManager. Specifically, there are setTransactionSynchronizationRegistry/getTransactionSynchronizationRegistry methods for programmatic configuration now. Motivated by Spring's adapting to a Hibernate JtaPlatform, specifically the Hibernate 4.3 changes in that area.
Issue: SPR-10839