Add another allocstate. Need this to distinguish between between plab nodes that fail to initialize (in vnode_setup, and thus do not need to be de-sliced) and plab nodes that make it out of vnode_setup, but never hit ISUP (and thus need to be de-sliced).
Add another allocstate. Need this to distinguish between between plab
nodes that fail to initialize (in vnode_setup, and thus do not need to
be de-sliced) and plab nodes that make it out of vnode_setup, but
never hit ISUP (and thus need to be de-sliced).

This state is temporary; By moving existing code from os_setup to
vnode_setup, I think we can avoid this problem.

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