Version 1.5: set Python3 interpreter as default in shebang

stager_access.py

+#! /usr/bin/env python3
+
 # Copyright 2019 Stichting Nederlandse Wetenschappelijk Onderzoek Instituten,
 # ASTRON Netherlands Institute for Radio Astronomy
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -20,7 +22,7 @@
 # !! This is to ensure that when we change the remote interface, your scripts don't break and you will only have to
 # !! upgrade this module.
 
-__version__ = "1.4"
+__version__ = "1.5"
 
 import datetime
 from os.path import expanduser