In case when physical bridge was recreated on host, ovs agent
is trying to reconfigure it.
If there will be e.g. timeout while getting bridge's datapath_id,
RuntimeError will be raised and that caused crash of whole agent.
This patch changes that to not crash agent in such case but try to
reconfigure everything in next rpc_loop iteration once again.
Change-Id: Ic9b17a420068c0c76748e2c24d97be1ed7c460c7
Closes-Bug: #1837380