[keycloak-dev] changes to KeycloakTransaction and KeycloakTransactionManager API

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