Fixes race condition in LVMVolumeDriver create_cloned_volume method

When we create a clone volume, LVMVolumeDriver will firstly create a temp
snapshot for copying, the temp snapshot name is
"clone-snap-%s" % source_volume['id']. When we create multiple clone volumes
of the same volume simultaneously, which would trigger the race issuse.

I changes the temp snapshot name template to "clone-snap-%s" % volume['id'],
so temp snapshot name will be unique.

Fixes bug #1202139

Change-Id: I3a4f2585ea9e6f70b6f6f9889e900f19559b8176
Merge "Fixes race condition in LVMVolumeDriver create_cloned_volume method"