Change query to ensure that only one batch per person (per project) is active at a time. This avoids the situation where a person enters many batches, and they get scheduled all at once, sucking up every node in the testbed.
Change query to ensure that only one batch per person (per project) is
active at a time. This avoids the situation where a person enters many
batches, and they get scheduled all at once, sucking up every node in
the testbed.

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