Update Hyper-V Barclamp to Python 2.7.5 and local Python environment

Updated the Hyper-V Barclamp to use Python 2.7.5 and extract all Python modules from a local archive, with no need for internet connection.
Fixed pyopenssl dependency issue for SUSE Cloud 2.0
Create and redistribute ssh keys for Nova user

The nova non-life migration feature requires to be able
to ssh from nova@ to other nova@ users on other compute nodes.
Setup the ssh keys properly for that.
Merge pull request #233 from ociuhandu/patch-1

+2, only impacts HyperV - accepting w/o smoke
Merge pull request #216 from dirkmueller/ssh_migrate

Add support for offline-migration