Inter-connect k8s external and openstack integration bridge

Change-Id: Ibd889e9fd4a10a06056b823d6c01254429d5cdc4
(cherry picked from commit a4d8fba801d1514d01d7a2c1ccfb59722a433583)
diff --git a/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/Constants.java b/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/Constants.java
index 59a5715..b928b5f 100644
--- a/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/Constants.java
+++ b/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/Constants.java
@@ -38,8 +38,10 @@
     public static final String ROUTER = "router";
     public static final String INTEGRATION_TO_TUN_BRIDGE = "int-tun";
     public static final String TUN_TO_INTEGRATION_BRIDGE = "tun-int";
-    public static final String OS_TO_K8S_BRIDGE = "os-k8s";
-    public static final String K8S_TO_OS_BRIDGE = "k8s-os";
+    public static final String OS_TO_K8S_INTEGRATION_BRIDGE = "os-k8s-int";
+    public static final String K8S_INTEGRATION_TO_OS_BRIDGE = "k8s-int-os";
+    public static final String OS_TO_K8S_EXTERNAL_BRIDGE = "os-k8s-ext";
+    public static final String K8S_EXTERNAL_TO_OS_BRIDGE = "k8s-ext-os";
     public static final String VXLAN_TUNNEL = "vxlan";
     public static final String GRE_TUNNEL = "gre";
     public static final String GENEVE_TUNNEL = "geneve";