
The hook for os-net-config in multinode NIC config templates contains a call to `ovs-vsctl del-br br-ex` to remove the bridge we got from nodepool and initialize network config. We need to avoid executing that again on upgrade, or the Ansible process running the upgrade gets stuck. Change-Id: Ie36342402426d74fd528e320d60adc951bf8c9ac Closes-Bug: #1772040