[ONOS-3363] Create arp_tha selector to onos

	modified:   core/api/src/main/java/org/onosproject/net/flow/DefaultTrafficSelector.java
	modified:   core/api/src/main/java/org/onosproject/net/flow/TrafficSelector.java

Change-Id: Id97469c133e0c10e44cda385dabb7c4ecca4af2b
diff --git a/core/api/src/main/java/org/onosproject/net/flow/DefaultTrafficSelector.java b/core/api/src/main/java/org/onosproject/net/flow/DefaultTrafficSelector.java
index 453a764..fcaa5c0 100644
--- a/core/api/src/main/java/org/onosproject/net/flow/DefaultTrafficSelector.java
+++ b/core/api/src/main/java/org/onosproject/net/flow/DefaultTrafficSelector.java
@@ -353,6 +353,11 @@
         }
 
         @Override
+        public Builder matchArpTha(MacAddress addr) {
+            return add(Criteria.matchArpTha(addr));
+        }
+
+        @Override
         public TrafficSelector build() {
             return new DefaultTrafficSelector(ImmutableSet.copyOf(selector.values()));
         }