Updated openstack/openstack
Project: openstack/keystone  ddea84840bdf3c822ed5d93ea63ecfed3e6f83b0
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Switch over to oslosphinx

oslosphinx is the new name of oslo.sphinx

Closes-Bug: #1277168
Change-Id: I9c52b7ad5459c51ed3d2a92d9011c34c9de4de5a