Fix various issues in macrocontainer removal
Fix various issues in macrocontainer removal

- also remove stopped containers
- skip already removed containers
- remove any Docker defined volumes
- actually remove storage subdirectories

leapp-to/prototype,mfranczy/prototype,pcahyna/leapp-to-prototype,mfranczy/prototype,GAZDOWN/leapp,mfranczy/prototype,GAZDOWN/prototype,vmindru/prototype,vinzenz/prototype,ncoghlan/prototype,leapp-to/prototype,leapp-to/prototype,GAZDOWN/prototype,GAZDOWN/prototype,ncoghlan/prototype,ncoghlan/prototype,vinzenz/prototype,vmindru/prototype,vmindru/prototype,GAZDOWN/leapp,pcahyna/leapp-to-prototype,vinzenz/prototype,pcahyna/leapp-to-prototype,vinzenz/prototype,pcahyna/leapp-to-prototype,GAZDOWN/prototype,mfranczy/prototype,ncoghlan/prototype,leapp-to/prototype,vmindru/prototype