python3 shebangs

var/local/xcache/gStream2tcp.py

-#!/usr/bin/env python3.6
+#!/usr/bin/env python3
 
 # from https://github.com/ivukotic/docker-xcache/blob/40d6fee1b49742ff58f06067f153f95c8fc6171f/atlas-xcache/gStream2tcp.py
 

var/local/xcache/reporter.py

-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # script from Ilya to report to ES in Chicago
 # https://github.com/opensciencegrid/docker-xcache/blob/master/atlas-xcache/reporter.py

var/local/xcache/reporter4.py

-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # script from Ilya to report to ES in Chicago
 # https://raw.githubusercontent.com/ivukotic/docker-xcache/master/atlas-xcache/reporter4.py