Avoid placing pending jobs in AdminHold state due to backfill scheduler
interactions with advanced reservation.
Specifically, if the backfill scheduler tests a pending job can be
scheduled after it's advanced reservation ends then the job was
assigned a priority of zero (AdminHold).

undefined variable.

requested and allocated.

allocation as taking up the entire node instead of just part of the node
allocated.  And always enforce exclusive on a step request.

to attempt to signal tasks on the frontend node.

deny the job instead of holding it.

If DenyOnLimit is set, reject job if NumCPUs * TimeLimit > MaxCPUMins

(It is good on that system)

if only one node is given to 'sinfo -n <nodename>' and a partition
does not contain all nodes, the node may not be printed even if it
is in the partition.

Fix for bug 268

to implicitly create full system block.

implicitly create full system block.

cpu count would be reflected correctly.