UserGroup: Conform the class and file naming

application/controllers/ListController.php

@@ -143,7 +143,7 @@ class Director_ListController extends ActionController
             'director/object/usergroup'
         );
         $this->view->title = $this->translate('Icinga Usergroups');
-        $this->view->table = $this->loadTable('icingaUsergroup')->setConnection($this->db());
+        $this->view->table = $this->loadTable('icingaUserGroup')->setConnection($this->db());
         $this->render('table');
     }
 

application/controllers/ObjectController.php

@@ -204,7 +204,7 @@ class Director_ObjectController extends ActionController
 
     public function usergroupAction()
     {
-        $this->view->form = $this->loadForm('icingaUsergroup')
+        $this->view->form = $this->loadForm('icingaUserGroup')
             ->setDb($this->db())
             ->setSuccessUrl('director/list/usergroups');
 

application/forms/IcingaUserGroupForm.php

@@ -4,7 +4,7 @@ namespace Icinga\Module\Director\Forms;
 
 use Icinga\Module\Director\Web\Form\DirectorObjectForm;
 
-class IcingaUsergroupForm extends DirectorObjectForm
+class IcingaUserGroupForm extends DirectorObjectForm
 {
     public function setup()
     {

application/tables/IcingaUserGroupTable.php

@@ -4,7 +4,7 @@ namespace Icinga\Module\Director\Tables;
 
 use Icinga\Module\Director\Web\Table\QuickTable;
 
-class IcingaUsergroupTable extends QuickTable
+class IcingaUserGroupTable extends QuickTable
 {
     public function getColumns()
     {

library/Director/Objects/IcingaUserGroup.php

@@ -2,7 +2,7 @@
 
 namespace Icinga\Module\Director\Objects;
 
-class IcingaUsergroup extends IcingaObject
+class IcingaUserGroup extends IcingaObject
 {
     protected $table = 'icinga_usergroup';