WIP: CFD-134 - Changing group permission

#156 
WIP
![selection_382](https://cloud.githubusercontent.com/assets/99186/4842556/cf25e086-6026-11e4-8afd-607ed72781f7.png)

see https://github.com/capacity4dev/capacity4more/blob/develop/capacity4more/behat/features/bootstrap/FeatureContext.php#L713