Fixing sonar issues in whole class
https://sonar.onap.org/dashboard/index?id=org.onap.appc.client%3Aclient-lib%3Asrc%2Fmain%2Fjava%2Forg%2Fonap%2Fappc%2Fclient%2Fimpl%2Fprotocol%2FUEBMessagingService.java