Comment out the application of libvirt and nova sql patches.

I left them in just commented out as we will probably want to add them back in
at some point soon. They are broken under nova 2014.1.3 , and just removing them
still gives us boot from volume.

Snapshotting is still copying to local disk however, and we will file an upstream ticket with
Ubuntu to patch their distro.

fixes #362
Merge pull request #371 from caiush/nova_patch

Comment out the application of libvirt and nova sql patches.