Fix possible invalid memory reference in sched/backfill. Patch by Andriy
Grytsenko (Massive Solutions Limited).

Add flag to the select APIs for job suspend/resume indicating if the action
is for gang scheduling or an explicit job suspend/resume by the user. Only
an explicit job suspend/resume will reset the job's priority and make
resources exclusively held by the job available to other jobs. This change
is also needed for Cray systems with ALPS.

Based upon recent experience with smap/sview, we are reverting a
change that would display each node at a separate location even if
they share a common ZXYZ coordinate.

Add squeue support to display a job's license information. Patch by Andy
Roosen (University of Deleware).

If an salloc allocation is revoked and the job is in a suspended state,
send the child processes a SIGCONT before sending SIGHUP or SIGTERM so
that the processes can terminate immediately.

For front-end architectures on which job steps are run (emulated Cray and
BlueGene systems only), fix bug that would free memory still in use.

Processes suspended and resumed are determined by using process group ID
and parent process ID, so some processes may be missed. Since salloc runs
as a normal user, it's ability to identify processes associated with a job
is limited.

Only suspend the salloc command's children when suspending the job for cray systems.
This is required to prevent additional aprun commands from being spawned.

Modify srun_job_suspend() to return status (message sent or not)

Modify slurmctld logic to send SRUN_REQUEST_SUSPEND so that it does not wait
for a reply from salloc or srun.

This initializes the job_suspend callback function in srun.

Improve efficiency of select/linear plugin with topology/tree plugin
configured, Patch by Andriy Grytsenko (Massive Solutions Limited).

Modify smap and sview to display all nodes even if multiple
nodes exist at each coordinate.

Modify NODES_PER_COORDINATE as desired in
src/plugins/select/cray/libemulate/alps_emulate.c b/src/plugins/select/cray/libemulate/alps_emulate.c

this is a resubmission of https://github.com/chaos/slurm/pull/24

Cray systems: Add support to suspend/resume salloc command to insure that
aprun does not get initiated when the job is suspended.

Eliminate memory leak if cray.conf file is not found
Eliminate assert due to not using xmalloc if cray.conf file is found

Jimmy Tang:
- add underscores to internal helper functions
- remove static definitions of some variables
- use xfree and xmalloc when available

Peter Vermeulen
- Remove unneeded prototypes and dead code

updated drop-in replacement of the contribs/cray libalps test programs.
 * up-to-date updates of libalps (in synch with slurm's libalps)
 * support for Accelerators
 * alps_tests/reassemble_inventory and
 * alps_tests/test_reservation now have accelerator support
 * the latter implements the key/value format for passing parameters
   to e.g. the gres/gpu plugin (but here it is just a dumb test program).
Patch from Gerrit Renker and Stphen Trofinoff, CSCS.

With regard to forthcoming Accelerator support in Basil 1.2/Alps 4.0, this adds
interface support for passing the following Accelerator parameters:
 * accelerator type (currently only "GPU" is supported),
 * model/rank information (uninterpreted "family" string),
 * amount of on-board memory in MB.
02_Cray-Accelerator-params.diff
Patch from Gerrit Renker and Stephen Trofinoff, CSCS.

This adds support to parse Basil 1.2/Alps 4.0 per-node accelerator information.
01_Cray-Accelerator-basic-support.diff
Patch from Gerrit Renker and Stephen Trofinoff, CSCS

NOTE: THERE HAS BEEN A NEW FIELD ADDED TO THE CONFIGURATION RESPONSE RPC
    AS SHOWN BY "SCONTROL SHOW CONFIG". THIS FUNCTION WILL ONLY WORK WHEN THE
    SERVER AND CLIENT ARE BOTH RUNNING SLURM VERSION 2.3.0.pre6

Improve variable names, comments, variable types and various cosmetic
changes in select/linear.  Patch from Andriy Grytsenko (Massive
Solutions Limited).