After applying NNCP and rebooting, ovs-configuration service failed, causing node to turn `NotReady`

Issue

• After making changes using NodeNetworkConfigurationPolicy(NNCP) and rebooting the node, the node turns into NotReady.

• Direct-SSH to the affected node shows ovs-if-br-ex is not configured:

  $ sudo -i
  # nmcli connection show
  NAME                 UUID                TYPE            DEVICE
  Wired connection 1  <UUID_of_interface>  ethernet        <interface_name>
  lo                  <UUID_of_interface>  loopback        lo
  ovs-if-br-ex        <UUID_of_interface>  ovs-interface   --
  

• During the RHOCP cluster upgrade, after node reboot, the node turns into the NotReady state.