Updated openstack/openstack
Project: openstack/python-cinderclient  fb03281c9ebd204131d2f1fca6e8cf924a4ffda9
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Added support for running the tests under PyPy with tox

This is a precursor to having them run under check and gate.

Change-Id: I377f0a4dddc063402db7486789f7c00847013eec