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/api/src/test/java/org/onosproject/net/intent/ConnectivityIntentTest.java b/core/api/src/test/java/org/onosproject/net/intent/ConnectivityIntentTest.java
index 8628b30..d6b2882 100644
--- a/core/api/src/test/java/org/onosproject/net/intent/ConnectivityIntentTest.java
+++ b/core/api/src/test/java/org/onosproject/net/intent/ConnectivityIntentTest.java
@@ -35,8 +35,8 @@
     public static final ApplicationId APPID = new TestApplicationId("foo");
 
     public static final IntentId IID = new IntentId(123);
-    public static final TrafficSelector MATCH = DefaultTrafficSelector.builder().build();
-    public static final TrafficTreatment NOP = DefaultTrafficTreatment.builder().build();
+    public static final TrafficSelector MATCH = DefaultTrafficSelector.emptySelector();
+    public static final TrafficTreatment NOP = DefaultTrafficTreatment.emptyTreatment();
 
     public static final ConnectPoint P1 = new ConnectPoint(DeviceId.deviceId("111"), PortNumber.portNumber(0x1));
     public static final ConnectPoint P2 = new ConnectPoint(DeviceId.deviceId("222"), PortNumber.portNumber(0x2));