* Fix for Issue##549
Catch ClientProtocolException and Update Error Logs
* Fix indentation, checkstyle errors
* Fix for Issue #549
Add fallbacks in Aggregator service when other microservices fail
* Make ProductInventoryClientImpl return null instead of zero in case of failure
* Fix for issue #954
Add javax.annotation and java.xml.bind as external maven dependencies
Verified with jdk-11
* Move dependency versions to main pom.xml's dependencyManagement section