Rename Openstack to OpenStack

Change-Id: I06f9390dc411653b7189c485a3d460ad21e2beb7
Switch over to oslosphinx

Doesn't seem to be used here, so easy to switch :)

Change-Id: I1ac85850b66c835450ee7705c5755e4f5408c8fc
Use git.openstack.org instead of github.com

We shouldn't be depending on github for our test runs.  It's bad
to have the gate blocked by a github outage that we have no
control over.

Change-Id: I07aea825691de236b6b8a8ff6d2265d1454ab51f
Merge "Switch over to oslosphinx"
Merge "Rename Openstack to OpenStack"