Bug 2386

This eliminates the overhead of separately issuing node_off and
  node_on commands with the single node_reinit command.
It also sets a node DOWN if the node_reinit command fails.
bug 2659

Also remove remove misleading note "Unless PreemptType=preempt/partition_prio
the partition Priority is not critical"; it does still impact scheduling
when nodes overlap partitions.

future changes similar to commit fb22bcc2 would most likely need to
be done.

in the slurmdbd segfaulting.

Bug 2656

This patch adds improved checking for errors and retry logic with
  respect to changing KNL NUMA & MCDRAM modes plus power cycling
  the nodes.
bug 2658

The patch looks a bit odd, but it just wraps a block of code with
  "if (gres_context_cnt > 0) {"

Bug 2351

Bug 2351

This reverts commit 5083c09e.

Some portions of tests 21.30 and 21.34 failed with accounting and
priority basic. These changes disable portions of those tests as
needed based upon configuration.

The basic plugin doesn't do a decay. So it just needs to remove the all of the allocated minutes.

This add some additional logic to the commit made to version 15.08
as needed for operation with version 16.04. Specifically, once a
persistent burst buffer is created in versioin 16.04 the create
flag is cleared to prevent attempts at duplicate buffer create.
A new "use" persistent burst buffer is added for our needs (indicating
that a DataWarp "paths" operation is required). The first commit
is 905ac850

burst_buffer/cray - Don't call Datawarp "paths" function if script includes
    only create or destroy of persistent burst buffer. Some versions of Datawarp
    software return an error for such scripts, causing the job to be held.
bug 2624

No change in any logic or definitions

burst_buffer/cray - Don't call Datawarp "paths" function if script includes
    only create or destroy of persistent burst buffer. Some versions of Datawarp
    software return an error for such scripts, causing the job to be held.
bug 2624

No change in any logic or definitions

Without these time limits and without time limits on the partitions,
the group usage limits become huge values and make validation of some
qos/association limit tests confusing

Bug 2601

When using NO_NHC, the step's job ptr would be nulled out before signalling the tasks.

I noticed that the CpuFreqDef config option was only partially implemented. The value was parsed, but the never used. So I took the liberty of re-purposing it to mean sort of the opposite, namely the frequency governor to use when running a job step in case the job doesn't explicitly provide any --cpu-freq option.

I also changed the default of the CpuFreqGovernors option to be "ondemand,performance", since ondemand isn't available with the intel_pstate driver.

Otherwise the patch should be relatively straightforward and only changes a few minor things here and there.

a) setpgrp() swapped for equivalent setpgid(0, 0)

b) define _GNU_SOURCE to unmask getline function definition in stdlib.h

The test was sensitive with respect to a batch step starting before
  requeuing the job. The batch step accounting record either appeared
  in the accounting records or did not depending upon timing. A sleep
  has been added after the job enters RUNNING state to make sure the
  batch steps starts and an accounting records is generated for it.

Include test ID in the account name to better identify where
  vestigial accounts come from.

Coverity reported:
    CID 93013:  Error handling issues  (CHECKED_RETURN)
	    "read(int, void *, size_t)" returns the number of bytes read, but it is ignored.

umask() is also not thread-safe.

While waiting for the HealthCheckProgram to succeed, slurmd can be
stopped. The previous behavior introduced a delay up to 10 seconds
between the shutdown request and the actual shutdown. This patch
removes this delay.

Intentially leave the key value fixed, rather than initialize from
from /dev/urandom as is commonly recommended. Slurm does not rely on
the hash function for any cryptographic functionality, and randomness
would make debugging harder if the hash key changed on each start.

Found by clang.