Lint setup.py

* drops unused import setuptools.find_packages()
* fix up whitespaces

Change-Id: I5e1b6eddbefaed13c699dbb9b1105e5b2c6e3379
Replace git URL to git.wikimedia.org

The Gerrit URL is no more recommended, instead point to
git.wikimedia.org which is a bit nicer.

Change-Id: I9c96365adab11a63e1d6eef631725b860bbf85de
Merge changes I9c96365a,I5e1b6edd

* changes:
  Replace git URL to git.wikimedia.org
  Lint setup.py