Patch 4f68cde5bd6b4fcf839f6694457373c81d9548ba from chaos/slurm by Don Lipari, LLNL

The change in function call order of commit e60abe43
resulted in slurmd daemons on front-end systems not registering with the
proper node name.

put in a clean state when a block is freed.

bluegene.conf

Backfill scheduling - Add SchedulerParameters configuration parameter of
"bf_res" to control the resolution in the backfill scheduler's data about
when jobs begin and end. Default value is 60 seconds (used to be 1 second).

Do not drain the compute or front-end node when trying to start a job
for which the UID is not found

Release locks on cray system after inventory and before backfill scheduling loop
in order to not process more jobs and avoid blocking pending RPCs for so long