There was a bug in diskimage-builder when using pypi mirrors
if the host doesn't have "python" available DIB will fail.
So, I am going to bump the requirements minimum in Octavia for
diskimage-builder to be the minimum version with this fix.
1. Creates a new element for pyroute2
2. Adds this element to the amphora image
3. Updates the amphora REST interface to pass additional network information
4. Creates the policy based routes and rules on the amp during plug vip
5. Updates the REST API spec