Name the sbatch output file nicer

bin/param_runner

@@ -86,7 +86,7 @@ def main():
                 partition = str(p.vals['partition'])
                 time_limit = str(p.vals['time_limit'])
 
-                sbatch_cmd = [ 'sbatch', '-N', nodes, '-p', partition, '-t', time_limit, ]
+                sbatch_cmd = [ 'sbatch', '-N', nodes, '-p', partition, '-t', time_limit, '-oparam_runner_%j.out' ]
 
                 batch_script = "#!/bin/bash\n"
                 batch_script += python_exe