ip: Protocol Independent IP Neighbors

Type: feature

 - ip-neighbour: generic neighbour handling; APIs, DBs, event handling,
aging
 - arp: ARP protocol implementation
 - ip6-nd; IPv6 neighbor discovery implementation; separate ND,
MLD, RA
 - ip6-link; manage link-local addresses
 - l2-arp-term; events separated from IP neighbours, since they are not
the same.

vnet retains just enough education to perform ND/ARP packet
construction.
arp and ip6-nd to be moved to plugins soon.

Change-Id: I88dedd0006b299344f4c7024a0aa5baa6b9a8bbe
Signed-off-by: Neale Ranns <nranns@cisco.com>
diff --git a/test/test_ping.py b/test/test_ping.py
index 7e5c92f..87cb45c 100644
--- a/test/test_ping.py
+++ b/test/test_ping.py
@@ -51,7 +51,7 @@
         try:
             self.pg_enable_capture(self.pg_interfaces)
             self.pg_start()
-            self.logger.info(self.vapi.cli("show ip arp"))
+            self.logger.info(self.vapi.cli("show ip4 neighbors"))
             self.logger.info(self.vapi.cli("show ip6 neighbors"))
 
             remote_ip4 = self.pg1.remote_ip4
@@ -87,8 +87,7 @@
         try:
             self.pg_enable_capture(self.pg_interfaces)
             self.pg_start()
-            self.logger.info(self.vapi.cli("show ip arp"))
-            self.logger.info(self.vapi.cli("show ip6 neighbors"))
+            self.logger.info(self.vapi.cli("show ip neighbors"))
 
             remote_ip4 = self.pg1.remote_ip4
             ping_cmd = "ping " + remote_ip4 + " interval 0.01 burst 3"