Support setting ovn-ofctrl-wait-before-clear

Support was added for this option [1] to avoid dataplane downtime
during ovn upgrades where schema changes have happened. This
adds the ability for us to configure it.

[1] https://patchwork.ozlabs.org/project/ovn/patch/20220808182845.2746916-2-mmichels@redhat.com/

Co-Authored-By: David Hill <davidchill@hotmail.com>
Depends-On: https://review.opendev.org/c/openstack/puppet-ovn/+/863170
Change-Id: Ia2337e2f1802257f172ecf9e88995cd12ebc31d7

deployment/ovn/ovn-controller-container-puppet.yaml

@@ -131,6 +131,12 @@ parameters:
       OpenvSwitch integration bridge, in seconds.
     type: number
     default: 60
+  OVNOfctrlWaitBeforeClear:
+    description: >
+      Sets the time ovn-controller will wait on startup before clearing all
+      openflow rules and installing the new ones.
+    type: number
+    default: 8000
   CertificateKeySize:
     type: string
     default: '2048'
@@ -293,6 +299,7 @@ outputs:
             ovn::controller::hostname: "%{lookup('fqdn_canonical')}"
             ovn::controller::ovn_remote_probe_interval: {get_param: OVNRemoteProbeInterval}
             ovn::controller::ovn_openflow_probe_interval: {get_param: OVNOpenflowProbeInterval}
+            ovn::controller::ovn_ofctrl_wait_before_clear: {get_param: OVNOfctrlWaitBeforeClear}
             nova::compute::force_config_drive:
               if:
                 - not: {get_param: OVNMetadataEnabled}