New phystable elabinelab_vlans gets cleared out when removing physical resource tables.
New phystable elabinelab_vlans gets cleared out when removing physical
resource tables.

New routine to return whether experiment is an ElabInElab experiment.

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