Sweeping !33494 from 21.0 to master. Add Z counting grid submission scripts

Add Z counting grid submission scripts

See merge request !33494 (merged)

DataQuality/ZLumiScripts/grid/generateDSFile.py

+#!/usr/bin/env python
+# Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
+# helper script to generate JSON file of datasets for batch pathena submission
+
+import sys, json
+prefix = sys.argv[1]
+dslist = sys.argv[2:]
+jlist = []
+for ds in dslist:
+    jlist.append({'inDS': ds, 'outDS': prefix + '.' + ds.split(':')[-1]})
+with open('inOutDs.json', 'w') as ofile:
+    json.dump(jlist, ofile)