* 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
* initial push for core-java-9 tutorials
* Fixed Maven build with experimental java 9 Maven compiler plug-in. Minor
code changes
* Running maven build and changes to some of tests.
* Fixed maven build and modifications ot some tests
* Removing unnecessary files