When new dvr router is going to be created on the node, L3 agent
asks server for list of ports plugged to the subnets, to populate
arp entries for all fixed IPs from those ports.
There was missing info about allowed address pairs there, so those
IPs were not populated in the qrouter namespace.
Now it's added and L3 agent can add those arp entries to the qrouter
namespaces too.
Conflicts:
neutron/agent/l3/dvr_local_router.py
neutron/objects/port/extensions/allowedaddresspairs.py
neutron/tests/unit/db/test_l3_dvr_db.py
Closes-Bug: #1928466
Change-Id: I5d6c72c271ff450d9e43b3e33a99dd59d727882d
(cherry picked from commit 7b59b5069b)
888ab6a2fc