Namespace the UsergroupbackendController

application/controllers/UsergroupbackendController.php

@@ -1,6 +1,8 @@
 <?php
 /* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
 
+namespace Icinga\Controllers;
+
 use Icinga\Application\Config;
 use Icinga\Exception\NotFoundError;
 use Icinga\Forms\Config\UserGroup\UserGroupBackendForm;