Add script to split output from policy run

Parameters hard coded to split on 50k enteries per file which provides
reasonable parallel read efficiency for downstream tasks.
Put splits in a .d subdir of file name.

split-info-file

+#!/bin/bash
+
+# split an info file into individual list files to make searching with an array job fast
+
+file=$1
+dirname=${file}.d
+prefix=${dirname}/list-
+
+mkdir -p ${dirname}
+srun -p amd-hdr100 --time 06:00:00 --mem 4G split -a 3 -d -l 5000000 ${file} ${prefix}