For L2 ARP termination, use both brodcast ARP request and reply
packets to provide MAC/IP binding events.
For IP4/IP6 neighbor adress resolution, send resolution events
if there is an address resolution attemp with a static neighbor
entry where both IP and MAC matches. This allow probe of an IP
neighbor with a static entry to confirm it is responding with
a reply matching that of the static entry.
Change-Id: Iffb923bb5aea3f9021436735d5ca06e7b24f966f
Signed-off-by: John Lo <loj@cisco.com>