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Hi,

hijacking this thread to point out something that feels wrong in the
dependency chain which jumped out:

> Colecting testtools>=0.9.22 (from fixtures>=0.3.14->oslo.concurrency>=1.4.1->keystone==2015.1.dev395)

fixtures is imported in oslo_concurrency/fixture/lockutils.py but
that's not really used at _runtime_


Cheers,
Alan