Update some node feature logic to support KNL nodes.

If a user submits a job with duplcate partition names (e.g.
  "sbatch --partition=debug,debug,debug", slurm was creating
  multiple (duplicate) records in the job's partition list.
  This change prevents duplicate entries in that list.

Bug 2364

Commit fa331e30 fixes this.  The logic was bad to begin with...

uint32_t new_cpus = detail_ptr->num_tasks
	/ detail_ptr->cpus_per_task;

The / should had been * this whole time.  This was the reason we found
this in the first place.

bug 2369

# Conflicts:
#	src/slurmctld/reservation.c

If scancel is operating on large number of jobs and RPC responses from
    slurmctld daemon are slow then introduce a delay in sending the cancel job
    requests from scancel in order to reduce load on slurmctld.
bug 2256

If a job launch is delayed, the test was failing due to bad parsing.
These lines were being interpretted as a counter folloed by node
names of "queued" and "has":
  srun: job 1332712 queued and waiting for resources
  srun: job 1332712 has been allocated resources

Expand documentation for advanced reservation Purge_Comp flag in
  scontrol man page, add to advanced reservation web page, increase
  minimum start time from 1 to 5 minutes

bug 2366

Conflicts:
	META
	NEWS

Backfill scheduling properly synchronized with Cray Node Health Check.
    Prior logic could result in highest priority job getting improperly
    postponed.
bug 2350

This corrects logic from commit e5a61746
that could result in use of NULL pointer

It was previously triggered by executing "scontrol reconfig" on a
  front-end system while there was a job in completing state.

Properly account for memory, CPUs and GRES when slurmctld is reconfigured
    while there is a suspended job. Previous logic would add the CPUs, but not
    memory or GPUs. This would result in underflow/overflow errors in select
    cons_res plugin.
bug 2353

The counter is really intended to reflect the count of running or
  suspended jobs rather than running jobs alone. Previous logic
  would report an underflow for the "job_cnt_run" variable if
  1. job submitted
  2. job suspended
  3. scontrol reconfig
  4. job cancelled

Log the length of bitmaps in addition to the bits set.
Also increase the string length used for logging.

Previous logic would prevent allocation of sockets to a job unless the
entire socket was available. If there were any specialized cores, the
socket was treated as being not available and unusable. For example,
if a node had 2 sockets, then a job requesting 2 specialized cores
would reserve one core on each of the two sockets and render the job
not runnable.

There was logic in sinfo's print state function that determined
if the state was MIXED. This logic was duplicated logic from the
_query_server() function in sinfo.c and has been removed. Also
note the logic was already gone from the "short state" print
function (I noticed the discrepeancy in the print functions,
but discovered they both printed the correct state information).

Add reservation flag of "purge_comp" which will purge an advanced
    reservation once it has no more active (pending, suspended or running) jobs.
bug 2355

Conflicts:
	src/plugins/sched/backfill/backfill.c

Fix backfill scheduling bug which could postpone the scheduling of jobs due
    to avoidance of nodes in COMPLETING state.
bug 2350

No need to look up the Reason string for a job, we just set the value.

Conflicts:
	NEWS