Fixes cinder volume from snapshot on Windows

When creating a volume from a snapshot on Windows, a shadow copy
volume is exported as an iSCSI disk. The issue is that this export
is readonly and cannot be mounted to instances.

As this export cannot be modified, to make the new volume usable,
the according image must be moved to a new path and imported .

Closes-Bug: #1306032

Change-Id: I3a936d30fdd7875059dc56c2681f453757c2605f
Merge "Fixes cinder volume from snapshot on Windows"