In the course of testing some scancel changes, a bunch of tests generated
"FAILURE" messages due to job cancellation failures, but the tests reported
"SUCCESS" at the end and an exit code of zero. This patch adds a checks
for the return value of the "cancel_job" procedure.

In slurmctld communication agent, make the thread timeout be the configured
value of MessageTimeout (or 30 seconds, whichever is larger) rather than
30 seconds.

Conflicts:
	src/scancel/scancel.c
	src/scancel/scancel.h

Fix scancel bug which could return an error on attempt to signal a job step.
A simple "scancel 12.3" to signal a specific job step would fail. Adding
another option (say "-i", "--partion=", etc.) would fix this.

check for more error conditions and avoid a memory leak if an error occurs.

Log when job state information is not being archived, but being cached. Print an error after each 100 jobs.

The plugin version number contents have changed in Slurm v15.08.

Recent scancel mods resulted in a duplicate error when trying to
signal a non-existent job. This removes the second error.

No change in logic

Previous logic would not recognize a job ID specification with a
  job array task ID of "*" (e.g. "123_*") to indicated all job
  array tasks.
Previous logic would stop any parsing after the closing bracket
  on a job array specification (e.g. "123_[4-6] 234" would not
  see the "234").
Improve logging of job ID specifications (i.e. use job array
  specification).

Conflicts:
	NEWS

Modify slurmctld's parsing of a job_id string for the job_signal and
job_requeue calls to treat a job ID value of "#_*" as representing
all tasks in a job ID number "#". Previously treated as invalid input.

Also set the last_job_update time so that if a pending job is killed,
then that is reported immediately by "squeue -i#" (previously it
may keep reporting stale date.

Trying to avoid having technical questions sent to "sales@schedmd.com"

This avoids letting the queued scheduling thread from starting
if the main scheduling loop is still running.

This reverts commit f9ebf5ad.

Conflicts:
	src/plugins/select/alps/basil_interface.c

before ending the job.

will make it so the slurmctld will not signal the apid's in a batch job.
Instead it relies on the rpc coming from the slurmctld to kill the job to
end things correctly.

Make this be the minimum time between the end of one scheduling
cycle and the start of the next cycle (rather than using start
times for both).
Set the default value to 1,000,000 microseconds for Cray/ALPS
systems.

Refactor scancel so that all pending jobs are cancelled before starting
cancellation of running jobs. Otherwise they happen in parallel and the
pending jobs can be scheduled on resources as the running jobs are being
cancelled.

Expect doesn't seem to be reading the full buffer, so the test
was modified to pass. Expect is only looking at the first 100
lines of ouptut from "sbatch --help".

Minor revisiions to the logic and documentation of commit
26624602