duplicate code.

When a persistent burst buffer is created, capture its session ID
  and create time from DataWarp and use that information in the
  reservation used for accounting purposes.

change after this point.

Remove some vestigial limits functions and convert to use new
  functions where appropriate. NOTE: burst_buffer/generic limits
  are now no longer functional. The plugin will need to be rebuild
  later based upon burst_buffer/cray.

Power management error codes were NOT added to end of enum,
resulting in inconsistent error codes/messages

Signed-off-by: Danny Auble <da@schedmd.com>

Add tres_id to state (in addition to tres_pos).
Add calls to post persistent buffer create/delete to accounting
  using advanced reservation data structure.
Add ID to buffer for use in accounting.
Fix short malloc bug.
Fix for unitialized variable.
Fix locking problem (wrong variable previous used).

Remove duplicate should in configurator

Add infrastructure for persistent burst buffer accounting.
Treat them like an advanced reservation.
Add association string to buffer record.
Preserve state in emulation mode

If an advanced reservation contains burst buffer space, store that
information in the accounting database (previously was NULL).

Prevent duplicate buffer allocation for interactive jobs (salloc/srun).

The files used by datawarp have been updated, this change to Slurm
  logic reflects this change in DataWarp.