Cleanup shebang and executable bit

- Add missing executable bits to all scripts
- Remove executable bits from all files that are not scripts,
  e.g. js, html, and Python libraries.
- Remove Python shebang from all Python library files.

It's frown upon to have executable library files in site-packages.

Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Armando Neto <abiagion@redhat.com>

ipatests/pytest_plugins/beakerlib.py

@@ -1,4 +1,3 @@
-#!/usr/bin/python3
 # Copyright (C) 2014  Red Hat
 # see file 'COPYING' for use and warranty information
 #

ipatests/setup.py

@@ -1,4 +1,3 @@
-#!/usr/bin/python3
 # Copyright (C) 2007  Red Hat
 # see file 'COPYING' for use and warranty information
 #

ipatests/test_ipapython/test_ipavalidate.py

@@ -1,4 +1,3 @@
-#!/usr/bin/python3 -E
 #
 # Copyright (C) 2007    Red Hat
 # see file 'COPYING' for use and warranty information
@@ -89,6 +88,3 @@ class TestValidate(unittest.TestCase):
         self.assertEqual(False, ipavalidate.GoodName("foo%bar"))
         self.assertEqual(False, ipavalidate.GoodName("*foo"))
         self.assertEqual(False, ipavalidate.GoodName("$foo.bar$"))
-
-if __name__ == '__main__':
-    unittest.main()