Log Message:
py-setuptools: update to 36.7.2.

v36.7.2
-------

* #701: Fixed duplicate test discovery on Python 3.

v36.7.1
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* #1193: Avoid test failures in bdist_egg when
  PYTHONDONTWRITEBYTECODE is set.

v36.7.0
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* #1054: Support ``setup_requires`` in ``setup.cfg`` files.

v36.6.1
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* #1132: Removed redundant and costly serialization/parsing step
  in ``EntryPoint.__init__``.

* #844: ``bdist_egg --exclude-source-files`` now tested and works
  on Python 3.