[keycloak-dev] changes to KeycloakTransaction and KeycloakTransactionManager API

[Bill Burke]

I want to simplify KeycloakTransaction interface a bit and remove the 
getRolbackOnly, setRollbackOnly, and isActive and only have them within 
KeycloakTransationManager.  I may have to refactor existing components 
to handle this.  See any issues?   All this is the continuous process of 
simplying our SPIs to make them easier to implement.

Bill