Correct task layout with CR_Pack_Node option and more than 1 CPU per task.
Previous logic would place one task per CPU launch too few tasks.
bug 1781

Backfill scheduler now considers OverTimeLimit and KillWait configuration
parameters to estimate when running jobs will exit. Initially the job's
end time is estimated based upon it's time limit. After the time limit
is reached, the end time estimate is based upon the OverTimeLimit and
KillWait configuration parameters.
bug 1774

Backfill scheduler: The configured backfill_interval value (default 30
    seconds) is now interpretted as a maximum run time for the backfill
    scheduler. Once reached, the scheduler will build a new job queue and
    start over, even if not all jobs have been tested.
bub 1774

Bug 1745

This reverts commit 3f91f4b2.

and test21.* updated to use them.

Bug 1745

ESLURM_DB_CONNECTION when in error.

Updates of existing bluegene advanced reservations did not work at all.
Some multi-core configurations resulting in an abort due to creating
  core_bitmaps for the reservation that only had one bit per node rather
  than one bit per core.
These bugs were introduced in commit 5f258072

job data structure.

Logic was assuming the reservation had a node bitmap which was
  being used to check for overlapping jobs. If there is no node
  bitmap (e.g. a licenses only reservation), an abort would result.

Bug 1739

Bug 1743

Prevent double free.