* upgrade to spring boot 1.5.2
* add full update to REST API
* modify ratings controller
* upgrade herold
* fix integration test
* fix integration test
* minor fix
* fix integration test
* fix integration test
* minor cleanup
* minor cleanup
* remove log4j properties
* use standard logbook.xml
* remove log4j dependencies
* remove commons-logging
* merge
* fix conflict
* exclude commons-logging dependency
* cleanup
* minor fix
* minor fix
* Add NDC and JBoss Logging to the demo application
* NDC for Log4j, Log4j2 and JBoss Logging
* Simplify NDC example by making it a single operation instead of two
* Make NDC example as RestController, Use JBoss Logging only as a logging bridge
* Fix merge conflicts in pull request - log-mdc pom.xml updated