/**
  * Action that return all user role in the db     
  * @return JSON list of all user role 
  */
 public function getAllRolesAction()
 {
     try {
         DataUtility::setEntityManager($this->get('doctrine.orm.entity_manager'));
         $resp = new ServerResponse();
         $resp->setResponseData(UsersRoleBiz::getAllRoleAsArray());
         return new Response($resp->jsonEncode());
     } catch (\Exception $ex) {
         $resp = new ServerResponse();
         $resp->addErrorInfo("System", $ex->getMessage());
         return new Response($resp->jsonEncode());
     }
 }