Clean up shebangs for various files.

- Remove shebangs from:
  - ini files
  - unit tests
  - module_utils
  - plugins
  - module_docs_fragments
  - non-executable Makefiles
- Change non-modules from '/usr/bin/python' to '/usr/bin/env python'.
- Change '/bin/env' to '/usr/bin/env'.

Also removed main functions from unit tests (since they no longer
have a shebang) and fixed a python 3 compatibility issue with
update_bundled.py so it does not need to specify a python 2 shebang.

A script was added to check for unexpected shebangs in files.
This script is run during CI on Shippable.

test/sanity/code-smell/shebang.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+grep '^#!' -RIn . 2>/dev/null | grep ':1:' | sed 's/:1:/:/' | grep -v -E \
+    -e '^\./lib/ansible/modules/' \
+    -e '^\./test/integration/targets/[^/]*/library/[^/]*:#!powershell$' \
+    -e ':#!/bin/sh$' \
+    -e ':#!/bin/bash( -[eux]|$)' \
+    -e ':#!/usr/bin/make -f$' \
+    -e ':#!/usr/bin/env python$' \
+    -e ':#!/usr/bin/env bash$' \
+    -e ':#!/usr/bin/env fish$'
+
+if [ $? -ne 1 ]; then
+    echo "One or more file(s) listed above have an unexpected shebang."
+    echo "See $0 for the list of acceptable values."
+    exit 1
+fi

test/units/modules/extras/cloud/amazon/test_ec2_vpc_nat_gateway.py

@@ -1,5 +1,3 @@
-#!/usr/bin/python
-
 from nose.plugins.skip import SkipTest
 
 try:
@@ -489,9 +487,3 @@ class AnsibleEc2VpcNatGatewayFunctions(unittest.TestCase):
         )
         self.assertFalse(success)
         self.assertFalse(changed)
-
-def main():
-    unittest.main()
-
-if __name__ == '__main__':
-    main()

test/units/modules/extras/cloud/amazon/test_kinesis_stream.py

@@ -1,5 +1,3 @@
-#!/usr/bin/python
-
 from nose.plugins.skip import SkipTest
 
 try:
@@ -287,10 +285,3 @@ class AnsibleKinesisStreamFunctions(unittest.TestCase):
         self.assertTrue(changed)
         self.assertEqual(results, should_return)
         self.assertEqual(err_msg, 'Kinesis Stream test updated successfully.')
-
-
-def main():
-    unittest.main()
-
-if __name__ == '__main__':
-    main()

test/units/parsing/utils/test_jsonify.py

@@ -1,4 +1,3 @@
-#!/usr/bin/python
 # -*- coding: utf-8 -*-
 # (c) 2016, James Cammarata <jimi@sngx.net>
 #

test/units/plugins/action/test_action.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 # (c) 2015, Florian Apolloner <florian@apolloner.eu>
 #

test/utils/shippable/code-smell.sh

@@ -20,6 +20,7 @@ test/sanity/code-smell/replace-urlopen.sh .
 test/sanity/code-smell/use-compat-six.sh lib
 test/sanity/code-smell/boilerplate.sh
 test/sanity/code-smell/required-and-default-attributes.sh
+test/sanity/code-smell/shebang.sh
 
 shellcheck \
     test/integration/targets/*/*.sh \