Updated openstack/openstack
Project: openstack/oslo.i18n  57e22f17e92b4bdf8d7227fbbc73a6d2a2f12a9b

Update sphinx and hacking requirements

Update the sphinx version allowed for building documentation.

Update the version of hacking used for code checks. At the same time,
fix the code that causes new checks in hacking 0.9 to fail.

Change-Id: Iafbfaf961838de9e6a1c2f5d474929cafd049a70