slurmdb_combine_tres_strings.

Bug 858

Plus some cosmetic changes to a couple of tests

end up pointing to qos_ptr_2 erroneously.

clearing the pointer in the partition record.

Fix case where job would get the wrong cpu count when using --ntasks-per-core and --cpus-per-task together.

Bug 1370

Bug 1295
Continuation of 166a4eb8

We are using a non-default AuthInfo configuration and based on
log-messages we see I believe this is not properly handled in certain
parts of the code.

Typical log message:
Aug 12 17:06:15 t02n20 slurmd[27001]: error: Munge encode failed:
Failed to access "/var/run/munge/munge.socket.2": No such file or
directory
Aug 12 17:06:15 t02n20 slurmd[27001]: error: Creating authentication
credential: Socket communication error
Aug 12 17:06:15 t02n20 slurmd[27001]: error: stepd_connect to 3165.0
failed: Protocol authentication error
Aug 12 17:06:15 t02n20 slurmd[27001]: error: If munged is up, restart
with --num-threads=10

Unfortunately the reservation's core_bitmap is a global bitmap and the nodes
in the system may have changed in terms of their node count or nodes have been
added or removed. Make best effort to rebuild the reservation's core_bitmap
on the limited information currently available. The specific cores might
change, but this logic at least leaves their count constant and uses the
same nodes
bug 1850

Add logic to get default account/qos information for newly discovered
  buffers in order to properly enforce limits.
Add logic to get TRES index for limits
Refactor bb_find_user_rec() function argument

we are running with associations.

If a burst buffer is found that was created outside of Slurm then
  add it to Slurm's data, including limits logic.
If a Slurm burst buffer was destroyted outside of Slurm, then
  remove it from Slurm's data, including limits logic.