Carry previous next hop information in RouteEvent

Change-Id: Ib66a9191892c0e62b54fddcbfdc5645f305e9fcf
diff --git a/incubator/net/src/main/java/org/onosproject/incubator/net/routing/impl/RouteManager.java b/incubator/net/src/main/java/org/onosproject/incubator/net/routing/impl/RouteManager.java
index 4c0f59e..6669281 100644
--- a/incubator/net/src/main/java/org/onosproject/incubator/net/routing/impl/RouteManager.java
+++ b/incubator/net/src/main/java/org/onosproject/incubator/net/routing/impl/RouteManager.java
@@ -120,7 +120,7 @@
                 if (routes != null) {
                     routes.forEach(route -> {
                         NextHopData nextHopData = routeStore.getNextHop(route.nextHop());
-                            l.post(new RouteEvent(RouteEvent.Type.ROUTE_UPDATED,
+                            l.post(new RouteEvent(RouteEvent.Type.ROUTE_ADDED,
                                     new ResolvedRoute(route, nextHopData.mac(),
                                             nextHopData.location())));
                     });