Remove executable bit and shebang from setup.py

Per discussions in this thread, the default should be -x without
the shebang:

    http://lists.openstack.org/pipermail/openstack-dev/2015-June/067323.html

Change-Id: I3f1046e1416890d9058c1c0e06df46f53f57f62e

oslo.{{cookiecutter.module_name}}/setup.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 # Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");