Fix findiface code that is supposed to lookup by IP if MAC lookup failed. Code never worked, we were just lucky.
Fix findiface code that is supposed to lookup by IP if MAC lookup failed.
Code never worked, we were just lucky.

nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome