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/core/net/src/test/java/org/onosproject/net/intent/impl/phase/CompilingTest.java b/core/net/src/test/java/org/onosproject/net/intent/impl/phase/CompilingTest.java
index 8ce4858..11a6e6e 100644
--- a/core/net/src/test/java/org/onosproject/net/intent/impl/phase/CompilingTest.java
+++ b/core/net/src/test/java/org/onosproject/net/intent/impl/phase/CompilingTest.java
@@ -63,8 +63,8 @@
 
     private final ApplicationId appId = new TestApplicationId("test");
     private final ProviderId pid = new ProviderId("of", "test");
-    private final TrafficSelector selector = DefaultTrafficSelector.builder().build();
-    private final TrafficTreatment treatment = DefaultTrafficTreatment.builder().build();
+    private final TrafficSelector selector = DefaultTrafficSelector.emptySelector();
+    private final TrafficTreatment treatment = DefaultTrafficTreatment.emptyTreatment();
     private final ConnectPoint cp1 = new ConnectPoint(deviceId("1"), portNumber(1));
     private final ConnectPoint cp2 = new ConnectPoint(deviceId("1"), portNumber(2));
     private final ConnectPoint cp3 = new ConnectPoint(deviceId("2"), portNumber(1));