When running Neutron on a single node that only has a single interface,
the following operations are required:
* Remove the IP address from the physical interface
* Add the interface to the OVS physical bridge
* Add the IP address from the physical interface to the OVS bridge
* Update the routing table
The reverse is done on cleanup.
In order run Neutron on a single interface, the $PUBLIC_INTERFACE and
$OVS_PHYSICAL_BRIDGE variables must be set.
Co-Authored-By: Brian Haley <brian.haley@hp.com>
Change-Id: I71e2594288bae1a71dc2c8c3fb350b913dbd5e2c
00e16a9d53