Add PowerParameters cap_watts, decrease_rate, increase_rate, lower_threshold,
    and upper_threshold
Add basic power re-balancing logic across the compute nodes

getgrnam_r().

Conflicts:
	src/common/gres.c

Improve logging, comments, and formatting

The thread is not fleshed out yet

Conflicts:
	contribs/perlapi/libslurmdb/Makefile.in

This change prevents a new debug() message from being generated
if an explicit timeout was set, as used by END_DEBUG3.

Log long processing times with the verbose() call only if they
  take over 3 seconds (previously 1 second).
Log anything over 1 second using debug().
bug 1082

installing

Conflicts:
	src/slurmctld/job_mgr.c

If some tasks of a job array are runnable and the meta-job array
record is not runable (e.g. held), the old logic could start a
runable task then try to start the non-runable meta-job, discover
it can not run, and set its reason to "BadConstraints".

Test case:
Make it so no jobs can start (partition stopped, slurmd down, etc.)
submit a job array
hold the job array
release the first two tasks of the job array
Make it so jobs can start

This backports some logic already added to v15.08

Conflicts:
	src/squeue/print.c

Squeue modified to not merge tasks of a job array if their wait reasons
differ.
bug 1388

Bad copy/paste, needed to change name offset

No functions currently exist, only the plugin wrapper and stubbed functions.

New configuration parameters: PowerParameters, PowerPlugin
New power management web page

--export sbatch/srun command line option, propagate the users'
environ to the execution side. #1367

a Cray being that of a normal Linux system.