Sends GARP packet to switch when the router is changed to other LEG nodes.

Change-Id: I2765e1b3f805a66f45a624ec82cc45d776321411
diff --git a/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/KubevirtRoutingSnatHandler.java b/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/KubevirtRoutingSnatHandler.java
index 9380e43..4e3f811 100644
--- a/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/KubevirtRoutingSnatHandler.java
+++ b/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/KubevirtRoutingSnatHandler.java
@@ -716,6 +716,7 @@
                                         gatewayNode, kubevirtPort, true);
                             });
                         });
+                sendGarpPacketForSnatIp(router);
             }
         }