Fix bug: edit LDAP group settings from admin panel

The group_params method was filtering out the ldap_cn and ldap_access
attributes when creating/updating a group from the admin interface.

app/controllers/admin/groups_controller.rb

@@ -58,6 +58,6 @@ class Admin::GroupsController < Admin::ApplicationController
   end
 
   def group_params
-    params.require(:group).permit(:name, :description, :path, :avatar)
+    params.require(:group).permit(:name, :description, :path, :avatar, :ldap_cn, :ldap_access)
   end
 end