add "icingacli director hostgroups" CLI command for listing hostgroups defined in Icinga Director

application/clicommands/HostgroupsCommand.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Icinga\Module\Director\Clicommands;
+
+use Icinga\Module\Director\Cli\ObjectsCommand;
+
+/**
+ * Manage Icinga Hostgroups
+ *
+ * Use this command to list Icinga Hostgroup objects
+ */
+class HostgroupsCommand extends ObjectsCommand
+{
+}