pyfakefs: Still some wrong permissions vs. shebang

Describe the bug #461 is still not totally resolved. With the latest release (4.5.6) these files are still broken:

[   18s] python2-pyfakefs.noarch: W: non-executable-script /usr/lib/python2.7/site-packages/pyfakefs/tests/all_tests.py 644 /usr/bin/env python
[   18s] python2-pyfakefs.noarch: W: non-executable-script /usr/lib/python2.7/site-packages/pyfakefs/tests/all_tests_without_extra_packages.py 644 /usr/bin/env python
[   18s] python2-pyfakefs.noarch: W: non-executable-script /usr/lib/python2.7/site-packages/pyfakefs/tests/example_test.py 644 /usr/bin/env python
[   18s] python3-pyfakefs.noarch: W: non-executable-script /usr/lib/python3.6/site-packages/pyfakefs/tests/all_tests.py 644 /usr/bin/env python
[   18s] python3-pyfakefs.noarch: W: non-executable-script /usr/lib/python3.6/site-packages/pyfakefs/tests/all_tests_without_extra_packages.py 644 /usr/bin/env python
[   18s] python3-pyfakefs.noarch: W: non-executable-script /usr/lib/python3.6/site-packages/pyfakefs/tests/example_test.py 644 /usr/bin/env python
[   18s] This text file contains a shebang or is located in a path dedicated for
[   18s] executables, but lacks the executable bits and cannot thus be executed.  If
[   18s] the file is meant to be an executable script, add the executable bits,
[   18s] otherwise remove the shebang or move the file elsewhere.

How To Reproduce Check shebang lines and/or executable bits on those files.

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