Post-binding information about router ports is missing in results of RPC
calls made by l3 agents. sync_routers code ensures that bindings are
present, however, it does not refresh router objects before returning
them - for RPC clients ports remain unbound before the next sync and
there is no necessary address scope information present to create routes
from fip namespaces to qrouter namespaces.
Change-Id: Ia135f0ed7ca99887d5208fa78fe4df1ff6412c26
Closes-Bug: #1759971
ff5e8d7d6c