Reduce filter columns of the Hostgroup and Servicegroup data views

Its not necessary to expose those columns because these data views do not directly accept user input.

modules/monitoring/library/Monitoring/DataView/Hostgroup.php

@@ -8,28 +8,27 @@ namespace Icinga\Module\Monitoring\DataView;
  */
 class Hostgroup extends DataView
 {
-    /**
-     * {@inheritdoc}
-     */
     public function getColumns()
     {
         return array(
-            'instance_name',
             'hostgroup_alias',
             'hostgroup_name'
         );
     }
 
-    /**
+    public function getSortRules()
-     * {@inheritdoc}
+    {
-     */
+        return array(
+            'hostgroup_alias' => array(
+                'order' => self::SORT_ASC
+            )
+        );
+    }
+
     public function getStaticFilterColumns()
     {
         return array(
-            'host', 'host_alias', 'host_display_name', 'host_name',
+            'instance_name', 'host_name', 'service_description', 'servicegroup_name'
-            'hostgroup',
-            'service', 'service_description', 'service_display_name',
-            'servicegroup', 'servicegroup_alias', 'servicegroup_name'
         );
     }
 }

modules/monitoring/library/Monitoring/DataView/Servicegroup.php

@@ -5,28 +5,27 @@ namespace Icinga\Module\Monitoring\DataView;
 
 class Servicegroup extends DataView
 {
-    /**
-     * {@inheritdoc}
-     */
     public function getColumns()
     {
         return array(
-            'instance_name',
             'servicegroup_alias',
             'servicegroup_name'
         );
     }
 
-    /**
+    public function getSortRules()
-     * {@inheritdoc}
+    {
-     */
+        return array(
+            'servicegroup_alias' => array(
+                'order' => self::SORT_ASC
+            )
+        );
+    }
+
     public function getStaticFilterColumns()
     {
         return array(
-            'host', 'host_alias', 'host_display_name', 'host_name',
+            'instance_name', 'host_name', 'hostgroup_name', 'service_description'
-            'hostgroup', 'hostgroup_alias', 'hostgroup_name',
-            'service', 'service_description', 'service_display_name',
-            'servicegroup'
         );
     }
 }