Differentiate plab node bootstrap tarball supplimental emulab tarballs according to if the inner plab is on the control or exp net.  Other fixes.
Differentiate plab node bootstrap tarball supplimental emulab tarballs
according to if the inner plab is on the control or exp net.  Other fixes.

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