Neutron OVS based Distributed Virtual Router

This blueprint spec provides information
about the Neutron OVS based Distributed
Virtual Router Implementation.

This changeset addresses gaps in the original
blueprint, in order to make it current to
upstream pushed code.

This blueprint addresses both the East-West routing
and North-South routing.

Change-Id: I5f92a214ddd52d1a2dc3c6f990c0d42d559ff831
Merge "Neutron OVS based Distributed Virtual Router"