Merge pull request #74 from invsblduck/havana_neutron_renames

finish s/quantum/neutron/ from 7aaf979c42
legacy filter_factory breaks havana neutron-server

(supposed to be fixed by https://bugs.launchpad.net/nova/+bug/1143998)
use newer (raring) openvswitch dkms

works with 12.04.[23]