Fix minor bug in resetVlanIfOnTrunk() - we convert the port number to channel number before calling this function.
Fix minor bug in resetVlanIfOnTrunk() - we convert the port number to
channel number before calling this function.

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