Further nova smoketest modifications:
1. Snapshot vm to volume
2. Boot from snapshoted instance-volume(with tests if it accesible from vm)
3. Create volume from image
4. Boot from volume created from image(with tests if it accesible from vm)
5. Snapshot delete
6. Volume delete

Also:
1. Tests skip feature for steps 11,12 due to a Cinder Bug 1183283
2. Comments about possible issues with nova Bug 1008622
3. Some improvements in order to make smoketest more stable in case of multiple reruns
4. Minor typos fixed
Minor regexp changes in order to get more clean output for a cinder versions comparison
Timeout for nova smoketest was increased from 600 up to 2400 in order to keep up with new nova smoketest which takes more time
Cinder role name changed in a search query ( from "cinder-server" to "cinder-controller" )
Merge pull request #186 from MirantisDellCrowbar/feature/DCB-117/release/pebbles/pull-req

Feature/dcb 117/release/pebbles/pull req