Open openvswitch_db_server port 6640 to interact with SDN controller

This change allows the openvswitch to interact with SDN controller
(e.g., ONOS, ODL) through 6640 port.

Story: 2005763
Task: 33473

Change-Id: Ifcbb6a157c230fa729d295ef0d3fb9a16fff60a2

openvswitch/templates/bin/_openvswitch-db-server.sh.tpl

@@ -42,6 +42,9 @@ function start () {
           --pidfile=${OVS_PID} \
           --remote=punix:${OVS_SOCKET} \
           --remote=db:Open_vSwitch,Open_vSwitch,manager_options \
+{{- if .Values.conf.openvswitch_db_server.ptcp_port }}
+          --remote=ptcp:{{ .Values.conf.openvswitch_db_server.ptcp_port }} \
+{{- end }}
           --private-key=db:Open_vSwitch,SSL,private_key \
           --certificate=db:Open_vSwitch,SSL,certificate \
           --bootstrap-ca-cert=db:Open_vSwitch,SSL,ca_cert

openvswitch/values.yaml

@@ -148,3 +148,7 @@ manifests:
   daemonset_ovs_vswitchd: true
   job_image_repo_sync: true
   network_policy: false
+
+conf:
+  openvswitch_db_server:
+    ptcp_port: null