Nova smoketest was expanded with following functions:

Cinder-volume tests:
1. Create volume
2. Volume List (with tests if created volume is in "available" state)
3. Volume attach (with tests if it accesible from vm)
4. Volume detach
5. Volume snapshot
6. Test volume created from a snapshot (list\convert to volume)
7. Check availability of volumes created from snapshots, from inside of guest OS
8. Remove snapshots and parent volumes