scontrol Fix for recently introduced parsing bug
sbatch- Add support for #PBS -l proc=option
Add SchedulerParameters value of "bf_max_job_part"

This specifies the maximum depth the backfill scheduler should go
in any single partition.
Decrease verbosity of logging
Merge branch 'slurm-2.6'

Conflicts:
	src/plugins/sched/backfill/backfill.c