Front End systems.

initially been added.

Use full state names rather than abbreviated form in reporting possible values
bug 1413

Conflicts:
	src/slurmctld/job_scheduler.c
	src/slurmd/slurmd/req.c

Bug 1397

Bug 1384

Improve logging, comments, and formatting

This change prevents a new debug() message from being generated
if an explicit timeout was set, as used by END_DEBUG3.

Log long processing times with the verbose() call only if they
  take over 3 seconds (previously 1 second).
Log anything over 1 second using debug().
bug 1082

installing

If some tasks of a job array are runnable and the meta-job array
record is not runable (e.g. held), the old logic could start a
runable task then try to start the non-runable meta-job, discover
it can not run, and set its reason to "BadConstraints".

Test case:
Make it so no jobs can start (partition stopped, slurmd down, etc.)
submit a job array
hold the job array
release the first two tasks of the job array
Make it so jobs can start

This backports some logic already added to v15.08

Conflicts:
	src/squeue/print.c

Squeue modified to not merge tasks of a job array if their wait reasons
differ.
bug 1388

--export sbatch/srun command line option, propagate the users'
environ to the execution side. #1367

a Cray being that of a normal Linux system.

bug 1379

bug 1375

based upon email from Taras to slurm mailing list

What this does is use the core level binding after each task is laid out
to skip all the extra threads in the core so it doesn't give them to
another task.

It probably isn't perfect, but does solve all the scenarios I found.

Fix for GRES scheduling in which there is CPU topology defined or
GRES types defined and there is more than 1 GPU per topology record
in slurmctld. Without this fix, only one GRES could be allocated
from each defined topology.
bug 1369

The slurmctld could abort with a gres configuration having
Type= configured, but no CPU binding configured.

Revert a changed definition used only in the debugging work from commit
ac9436bc