simplify exit on error by setting options at the beginning of the script

src/run-mmpol.sh

 #!/bin/bash
 
+set -euxo pipefail
+
 # run an mmapply policy across the cluster via slurm
 
 # gather info to map mmapplypolicy to runtime configuration
@@ -35,14 +37,6 @@ echo $cmd
 # run policy command
 $cmd
 
-rcode=$?
-
-if [ $rcode -ne 0 ]
-then
-  echo error: mmapplypoicy failed: code $rcode
-  exit $rcode
-fi
-
 # tag output file with run metadata
 outfile=`ls -t $tmpglobal | head -1`
 if [[ "$outfile" != "" ]]