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/cli/src/main/java/org/onosproject/cli/net/IntentPushTestCommand.java b/cli/src/main/java/org/onosproject/cli/net/IntentPushTestCommand.java
index 8a488a8..d140f97 100644
--- a/cli/src/main/java/org/onosproject/cli/net/IntentPushTestCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/IntentPushTestCommand.java
@@ -129,7 +129,7 @@
     private List<Intent> generateIntents(ConnectPoint ingress, ConnectPoint egress) {
         TrafficSelector.Builder selectorBldr = DefaultTrafficSelector.builder()
                 .matchEthType(Ethernet.TYPE_IPV4);
-        TrafficTreatment treatment = DefaultTrafficTreatment.builder().build();
+        TrafficTreatment treatment = DefaultTrafficTreatment.emptyTreatment();
 
         List<Intent> intents = Lists.newArrayList();
         for (int i = 0; i < count; i++) {