clean logical volumes in init_cinder

This part of code was forgotten when _clean_volume_group()
has been renamed.

Change-Id: I96fe749013b5cf1fd3411b2ba661302873e92994
Move swift stuff out of keystone-data.sh

- Fixes bug 1199918.

Change-Id: I808bdd74a94c8e0ca126b9bee1bfd53eafa189a9
Merge "clean logical volumes in init_cinder"
Merge "Move swift stuff out of keystone-data.sh"