Merge pull request #8 from MirantisDellCrowbar/feature/cleanup/pebbles/master

Feature/cleanup/pebbles/master
Merge pull request #9 from crowbar/release/pebbles/master

pull last changes
rpms
fixes for centos/rhel
force to use nosetest for rhel from venv
Merge pull request #41 from MirantisDellCrowbar/feature/DCB-149/pebbles/master

rhel/centos support for openstack [9/12]
Smoked without issue, note Ubuntu python-testtools package still needs update to >=0.9.28, it's still at 0.9.24