Remove deprecated AccountingStorageLoc (SOFTWARE-4446)

Slurm 20 gets mad about this:

fatal: The AccountingStorageLoc option has been removed. It is safe to
remove from your configuration.

Author: brianhlin

osgtest/tests/test_290_slurm.py

@@ -22,7 +22,6 @@
 """
 
 SLURM_CONFIG = """AccountingStorageHost=localhost
-AccountingStorageLoc=/tmp/slurm_job_accounting.txt
 AccountingStorageType=accounting_storage/slurmdbd
 AuthType=auth/munge
 ClusterName={cluster}