backport of commit 4f2e2801 from v16.05

Needed to change a couple of variables from 32- to 64-bit.

Add new burst_buffer.conf parameters: ValidateTimeout and OtherTimeout.
See man page for details.

previously take 2 restarts of the slurmdbd to make it stick correctly.

single-threaded cores.  A regression caused only 1 socket to be used on
this kind of node instead of all that were available.

If a job allocation returns some invalid contents, the pointer
  to the job structure may be NULL. This change preserves the error
  message and avoids a segv.

Fix case where if the backup slurmdbd has existing connections when it gives up control that the it would be killed.

If the backup had existing connections when giving up control, it would try to
signal the existing threads by using pthread_kill to send SIGKILL to the
threads. The problem is that SIGKILL doesn't go the thread but the main process
and the backup dbd would be killed.

when a cold-start (-c) happens to the slurmctld.

Conflicts:
	src/sacct/options.c

from a user.

This would cause the slurmctld to cache the old default which wasn't valid
and cause the user to have to request the association always.

Conflicts:
	NEWS
	src/plugins/accounting_storage/mysql/as_mysql_job.c

bug 2009

Each node could have fewer tasks allocated on a node than the plane
  size, which broke the test. The plane size needs to be treated
  as a maximum consecutive rank value.

byg 2013

database but the start record hadn't made it yet.

Create a "task" cgroup at job allocation time via the prolog container.
  A dummy "sleep" process will occupy the cgroup so long as the job exits.
bug 1994

requirements.

Add acct_gather_energy/ibmaem plugin for systems with IBM Systems Director
    Active Energy Manager.

Conflicts:
	src/slurmctld/job_mgr.c

bug 2011

It would not cause any problem other than excess memory being
allocated, but was found by CLANG.

','.

Conflicts:
	src/common/proc_args.c

bug 1999

A configuration of "DefMemPerNode=UNLIMITED" prevented more than
one job from running at a time on a given node, which broke some
tests. These changes prevent the tests from breaking.