Cherry-pick from https://gerrit.onos.onlab.us/#/c/338/

Lower the frequency of bug that PacketIn doesn't occur. (ONOS-1002)

Fixed a bug ProxyArpManager frequently deletes device from DB.

Change-Id: Ida1f8e36dee201b8d8dbd40325a2ee4a5c8736be

Fix compilation failure.

Change-Id: I0c3e253c6caa6f6b5315b30f2a647bb45d9c6b36
diff --git a/src/main/java/net/onrc/onos/ofcontroller/forwarding/Forwarding.java b/src/main/java/net/onrc/onos/ofcontroller/forwarding/Forwarding.java
index 9947eb0..3778632 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/forwarding/Forwarding.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/forwarding/Forwarding.java
@@ -244,7 +244,7 @@
 		}
 
 		 datagrid.sendPacketOutNotification(new BroadcastPacketOutNotification(
-				 eth.serialize(), sw.getId(), pi.getInPort()));
+				 eth.serialize(), null, sw.getId(), pi.getInPort()));
 	}
 	
 	private void handlePacketIn(IOFSwitch sw, OFPacketIn pi, Ethernet eth){