Reimplemented the ProxyArp app on top of the NeighbourResolutionService.

Also some small API changes to track app ID of handler registrations, and
improved interface matching in NeighbourPacketManager.

Added CLI to view handler registrations.

Change-Id: I8cd0b91a16d9ec60287b65f9d8fc5e3cd87560e8
diff --git a/apps/proxyarp/src/main/java/org/onosproject/proxyarp/package-info.java b/apps/proxyarp/src/main/java/org/onosproject/proxyarp/package-info.java
index d8ed846..960382f 100644
--- a/apps/proxyarp/src/main/java/org/onosproject/proxyarp/package-info.java
+++ b/apps/proxyarp/src/main/java/org/onosproject/proxyarp/package-info.java
@@ -15,6 +15,6 @@
  */
 
 /**
- * Proxy Arp  application that handles arp resolution for you.
+ * Application that handles ARP and NDP resolution on a single L2 broadcast domain.
  */
 package org.onosproject.proxyarp;