When slurmctld is reconfigured, it makes sure that every pending
batch job has a script and if not mark the job as failed. If the
script is present with no job, then purge the file/directory.

This re-write of the logic takes advantage of hash tables to
improve the performance of the algorithm and is an improvement
on the logic in commit 862f3c8e
and will work with the version 15.08 code base as well
Time for for slurmctld reconfig with 110,000 jobs/files
37.8 sec with original code
2.2  sec with commit 862f3c8e
0.8  sec with latest code
bug 2220

Fixed a typo that was causing slurm_cred_copy to segfault

This adds some job memory limits to avoid tests failing with a
configuration having SelectTypeParameters=CR_Memory and NO
default memory size.

Conflicts:
	src/plugins/jobcomp/elasticsearch/jobcomp_elasticsearch.c

If a job is configured to be sent a signal when approaching its
timeout and the job is requeued after the signal is sent, then
resend the signal at the approriate time after requeue.
bug 1415

If the backfill scheduler can not start at the appointed time, say
because there are too many pending RPC, then only sleep 1 second
and try again rather than the full bf_interval (30 seconds by default).

Same logic was in both backfill plugin and slurmctld/job_scheduler.c
No change in logic

Bug 2130

Adopted processes didn't have access to the job's devices.

Bug 2130

When slurmctld processes a SIGHUP or "scontrol reconfig" it
makes sure that every pending batch job as a directory containing
script and environment files, cancelling any job that lacks the
files and purging any files without a job. When there are a large
number of jobs (in any state) and a large number of files, the
nested loops to do this can run for a very long time (minutes).
This change streamlines the processing for job arrays, which now
avoid creating their own script and environment files by using that
of their job array master record.

Full revert of c2fbf88f, 13b64c35 had caught part of this, but
this will revert it completely.  The code just wasn't needed in modern
Slurm.  It appears the patch came from an older version of Slurm that
didn't handle this correctly.

This reverts commit 29f25688.

Conflicts:
	NEWS

Looks like this isn't needed, commit c2fbf88f doesn't appear to be needed
and is what is causing this issue.  c2fbf88f was added from an older
version of Slurm where this was already handled correctly in commit
815e5a44.

get messages like

slurmctld: error: _handle_assoc_tres_run_secs: job 33355: assoc 1 TRES node grp_used_tres_run_secs underflow, tried to remove 21 seconds when only 0 remained.

which are bad.

If a store fails, do not retry for 30 seconds

Cray job NHC delayed until after burst buffer released and epilog completes
    on all allocated nodes.
bugs 2099 and 2192

Add new buffer state of BB_STATE_POST_RUN indicating the post_run
  operation has been started
Add new bb_p_job_test_post_run function to test status of post_run
  operation
Execute post_run operation before the stage_out operation to opimize
  use of compute nodes (rather than burst buffer space)

Release a job's allocated licenses only after epilog runs on all nodes
    rather than at start of termination process.
bug 2192

sched/backfill - Delay backfill scheduler for completing jobs only if
    CompleteWait configuration parameter is set (make code match documentation).

moved code to common location.

Addition to b9668b2b

Bug 2030

Invalid user input could generate slurmctld error(), changed to info()

Conflicts:
	src/plugins/jobcomp/elasticsearch/jobcomp_elasticsearch.c

Eliminated redundant data structure
Minor performance improvements

correctly when PriorityFlags=CALCULATE_RUNNING is set.

Previously the slurmctld could seg fault if the tres_alloc_str is NULL.