Traceback (most recent call last):
 File "/usr/local/sbin/provision_slurm.py", line 100, in <module>
   mk_slurmuser_batch(usergroup,"default")
 File "/usr/local/sbin/provision_slurm.py", line 67, in mk_slurmuser_batch
   userdict = defaultdict(list)
NameError: global name 'defaultdict' is not defined

Update provision_slurm.py.j2 to fix logic in mk_slurmuser_batch. This previously did not add any users if one user in the list was a member of 'default'

speed up the default slurm provisioing by running groups of users rather than adding each user individually