Issues:
https://sonar.onap.org/code?id=org.onap.policy.common%3Acommon-modules&selected=org.onap.policy.common%3Apolicy-endpoints%3Asrc%2Fmain%2Fjava%2Forg%2Fonap%2Fpolicy%2Fcommon%2Fendpoints%2Fevent%2Fcomm%2Fbus%2Finternal%2FSingleThreadedBusTopicSource.java