Use port's MacAddress to associate ONOS port and Kubernetes port

Change-Id: I0a53962c61ddea06f4fb6bc6ab2a6f756cbc0052
diff --git a/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/util/K8sNetworkingUtil.java b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/util/K8sNetworkingUtil.java
index 0b8c4c9..e045d89 100644
--- a/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/util/K8sNetworkingUtil.java
+++ b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/util/K8sNetworkingUtil.java
@@ -124,7 +124,7 @@
      * @param comparedName  port name to be compared
      * @return true if the compared port name exists, false otherwise
      */
-    public static boolean existingContainerPort(String sourceName, String comparedName) {
+    public static boolean existingContainerPortByName(String sourceName, String comparedName) {
         if (comparedName == null) {
             return false;
         }
@@ -141,6 +141,24 @@
     }
 
     /**
+     * Checks that whether the compared ports exist in the source MAC address.
+     *
+     * @param sourceMac     source port MAC address
+     * @param comparedMac   MAC address of port to be compared
+     * @return true if the compared port MAC address exists, false otherwise
+     */
+    public static boolean existingContainerPortByMac(String sourceMac, String comparedMac) {
+        if (comparedMac == null || sourceMac == null) {
+            return false;
+        }
+
+        String shortSourceMac = sourceMac.substring(3).toUpperCase();
+        String shortComparedMac = comparedMac.substring(3).toUpperCase();
+
+        return shortSourceMac.equals(shortComparedMac);
+    }
+
+    /**
      * Returns the tunnel port number with specified net ID and kubernetes node.
      *
      * @param netId         network ID