OGM-509 Update copyrights header of the .properties files with one
OGM-509 Update checkstyle configuration

  * Change the rule related to the copyright header
  * Check includes resources
  * Test resources are not included
  * Upgrade maven-checkstyle-plugin version to 2.12.1
OGM-509 Fix Checkstyle rules violation in .xml and .properties files

  * White spaces
  * Missing line at the end of file