SWITCHYARD-1771 Support remote transaction propagation via SCA binding

Integrated XTS transaction bridge in the SCA remote invocation. If the client side has an active JTA transaction and its policy allows it to be propagated, then SCA invocation propagates the transaction context with using XTS transaction bridge.
SWITCHYARD-1729: Security context is not propagated between service calls
SWITCHYARD-1474 potential NPE in JCAActivator

elliminate bad manner coding which leads to NPE