Modify assoc_mgr_fill_in_qos() to allow for a flag to know if the QOS read
lock was locked outside of the function or not.  This also fixes a race
condition when adding a QOS and planning on using it right away when the
controller is busy with previous requests.
Small formatting issue in NEWS
Give even better estimates on pending node count if no node count
is requested.

This is a re-factor of commit e5635a76e21e related to bug 1148 to handle
the cases where a job could run, but an error was given when selecting
the nodes.
Change the debug level from error to debug as it seems it happens
always and it scares people.
Fix jobcomp/mysql plugin for MariaDB 10+/Mysql 5.6+ to work with reserved
work "partition".

reference bug 1246
Merge remote-tracking branch 'origin/slurm-14.03' into slurm-14.11

Conflicts:
	src/slurmctld/node_scheduler.c
	src/slurmctld/read_config.c