added logic to make it possible for qos to be updated on the fly and added to associations when they are added to the mix

to pass the memory check cleanly.

BLUEGENE - env vars such as SLURM_NNODES, SLURM_JOB_NUM_NODES, and SLURM_JOB_CPUS_PER_NODE now reference cnode counts instead of midplane counts.  SLURM_NODELIST still references midplane names.

error instead of doing an assertion failure.