Comment 1 for bug 1777170

A way to solve this bug would maybe be to add the relevant configuration to those overridden settings in https://github.com/openstack/tacker/blob/master/devstack/settings, for example by specifying OVS_BRIDGE_MAPPINGS+=$MGMT_PHYS_NET:$BR_MGMT and so on.

That way the user provided configuration may be preserved, and the code may be simplified, for example leveraging NEUTRON_CREATE_INITIAL_NETWORKS etc to create the bridges, allocate the IP to the interface etc.