Run ovs-configuration.service before dnsmasq.service

ARO's dnsmasq.service, if present, must be run after ovs-configuration. This,
could of course be fixed in that service's definition but doing so is not
operationally easy to do at this point. There is potential risk that some
other dnsmasq.service implementation needs to be run before ovs-configuration
and this change would break them. Given the temporal proximity to the breaking
change lets go ahead and make this.

We should also ensure that ARO makes their service more robust in the future.

templates/common/_base/units/ovs-configuration.service.yaml

@@ -8,7 +8,7 @@ contents: |
   Wants=NetworkManager-wait-online.service
   After=firstboot-osupdate.target
   After=NetworkManager-wait-online.service openvswitch.service network.service nodeip-configuration.service
-  Before=kubelet-dependencies.target node-valid-hostname.service
+  Before=kubelet-dependencies.target node-valid-hostname.service dnsmasq.service
 
   [Service]
   # Need oneshot to delay kubelet