Add ability to configure ovsdb_interface param

Change-Id: I5d2f813a57754a73bc5c1e81012294754f9f2063
Related-PROD: PROD-21583
diff --git a/README.rst b/README.rst
index d51c7b5..7e63a20 100644
--- a/README.rst
+++ b/README.rst
@@ -922,6 +922,7 @@
         user: admin
         password: admin
         ovsdb_connection: tcp:127.0.0.1:6639
+        ovsdb_interface: native
         enable_websocket: true
         enable_dhcp_service: false
         mechanism:
@@ -938,6 +939,7 @@
       backend:
         router: odl-router_v2
         ovsdb_connection: tcp:127.0.0.1:6639
+        ovsdb_interface: native
       opendaylight:
         ovsdb_server_iface: ptcp:6639:127.0.0.1
         ovsdb_odl_iface: tcp:10.20.0.77:6640