Automatic merge from branch-5.2

Automatic merge from branch-5.2

* origin/branch-5.2:
  [maven-release-plugin] prepare for next development iteration
  [maven-release-plugin] prepare release 5.2-RC3
  Hack for IE - use mime type text/plain for api/qualityprofiles/create
  fix quality profile deletion dialog on ie9
  Fix some quality flaw
  SONAR-6822 Rules search WS is not returning langName
  SONAR-6822 Move search action tests to a dedicated test class
  SONAR-6680 RuleRepository now load all rules at first call
  SONAR-6680 add RuleDao.selectAll to be used by CE's RuleRepository
  Fix quality flaws
  fix select2 closing problem in the facet sidebar