This patch implements a new agent named "BgpDrAgent". The new agent
will host different BGP speaking drivers and makes the required BGP
peering session/s for neutron. The agent takes the needed "peer/s and
route/s" information from the BGP speaker entity and synchronize the
same to the registerd driver.
For realizing HA, two BgpDrAgents should host the same BGP speaker.
Partially-Implements: blueprint bgp-dynamic-routing
Co-Authored-By: Ryan Tidwell <ryan.tidwell@hpe.com>
Co-Authored-By: Jaume Devesa <devvesa@gmail.com>
Co-Authored-By: Numan Siddique <nusiddiq@redhat.com>
Change-Id: I3217795bdd0fa2d9d4b39274f4f95fc013c8d29d