Updated openstack/openstack
Project: openstack/glance  a9f355a64f9a559d24d579f4ef50af3b16c7e444
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Switch over to oslosphinx

oslosphinx is the new name of oslo.sphinx

Closes-Bug: #1277168
Change-Id: I8aa08e3e16d46209b9aeb20a70b3984b2a4ae5bb