bug 1911

Remove our work around for a bug in the Cray API that has recently
  been fixed.
Improve error message for root jobs trying to use DW.

One API was fixed, another broke (work around for one removed, added
for the other API).

This fixes some race conditions with threads (e.g. a buffer is found
to be missing before the thread tearing it down records the operation
has completed).

If the show_sessions/instances/configuration API returns an error
code, test its contents before trying to parse it since it may
contain some genuine error message. This provides a better work
around for bug already reported to Cray.

This change is already logged in the NEWS for v14.11.10

over the limit with grpwall on a QOS or association.

limit.

job QOS.

Conflicts:
	src/squeue/print.c

Do not use full path for true utility in testsuite. Its location
differ across systems (/bin/true on Linux and /usr/bin/true on BSD).

Required to remove stale PMI2 sockets from /tmp

Previous logic would set the avail_node_bitmap when
a node was powered down, even if the initial state was
DOWN or DRAINED. This made the node available for allocation
to a job, which we don't want until the DOWN or DRAIN
state is cleared.
bug 1893

This reverts commits
7660da9e
5c386455 and
f6c5302b

Bug 1782

Bug 1741

C++ style comments in slurm.h break the slurm-drmaa configure

Conflicts:
	NEWS

Conflicts:
	META

Bug 1896