Set Alembic to detect pyc files
Merge pull request #5 from krsnapc/alembic

Set Alembic to detect pyc files
avoid Duplicate key errors in ml2_gre_allocations
avoid Duplicate key errors in ml2_gre_allocations
Integrate ML2/OVS into Piston Undercloud.
Allow tenant name to be specified instead of tenant id.

This is based on this abandoned changeset:
https://review.openstack.org/#/c/85492/
Allow ovs commands to be ran under neutron's account.

The Piston OVS setup has been modified so these will work for the
neutron user without sudo to increase performance, since these
commands are called with extreme frequency.