Defer interactive job allocation until ALL allocated nodes are ready
  rather than after PrologSlurmctld (if any) completes.

Bug 3467.

bug 1949

burst_buffer/cray - Do not execute "pre_run" operation until after all nodes
    are booted and ready for use.
bug 3461

partitions.

This reverts commit 843df527.

Insure job does not start running before node is booted and PrologSlurmctld
    is complete.
bug 3446

Ported from 7a4aa7f2.

and make it so the slurmd formats it correctly when it comes in.

Continuation of commit 7db90c8a

This is needed to make it so we can run pmix with multi-slurmd.

Bug 3446

bug 3446

burst_buffer/cray - Support default pool which is not the first pool
    reported by DataWarp and log in Slurm when pools that are added or removed
    from DataWarp.
bug 3453

This reverts commit fd690a9c.

was there for jobs and steps, but for no real reason.  I couldn't see a
reason anyway.

Add missing option for PURGE_JOB which is different than the others
and was missed on the changes made when adding the usage table
flushes.

sstat doesn't work on Cray ALPS but works on native Cray setups.