Implement stopvms command (OMS-363)
Implement HN use in allocation blacklisting support (OMS-258)
Implement auto-creation of VirtualizationContainer instances under Hangar according to available backends (OMS-296)
Merge pull request #67 from opennode/oms-363

Implement stopvms command (OMS-363)
Merge pull request #68 from opennode/oms-296

Multiple tasks (OMS-296, OMS-258, OMS-363)