Adding emptyTreatment() and emptySelector()

Note: There was a change that adds a DROP action to
a traffic treatment if there are no other actions present.
To get a traffic treatment without the drop rule, use
emptyTreatment()

Change-Id: I1f23ed5e1fa7519eb94fcafa85facbad815d5e9c
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/TopologyViewMessageHandler.java b/web/gui/src/main/java/org/onosproject/ui/impl/TopologyViewMessageHandler.java
index 29505b7..c27772f 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/TopologyViewMessageHandler.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/TopologyViewMessageHandler.java
@@ -312,8 +312,8 @@
 
         HostToHostIntent intent =
                 new HostToHostIntent(appId, one, two,
-                                     DefaultTrafficSelector.builder().build(),
-                                     DefaultTrafficTreatment.builder().build());
+                                     DefaultTrafficSelector.emptySelector(),
+                                     DefaultTrafficTreatment.emptyTreatment());
 
         intentService.submit(intent);
         startMonitoringIntent(event, intent);
@@ -333,7 +333,7 @@
         // FIXME: clearly, this is not enough
         TrafficSelector selector = DefaultTrafficSelector.builder()
                 .matchEthDst(dstHost.mac()).build();
-        TrafficTreatment treatment = DefaultTrafficTreatment.builder().build();
+        TrafficTreatment treatment = DefaultTrafficTreatment.emptyTreatment();
 
         MultiPointToSinglePointIntent intent =
                 new MultiPointToSinglePointIntent(appId, selector, treatment,