Follow PTI for this and add all needed changes, remove obsolete
options. Switch to openstackdocstheme instead of oslosphinx
since that is retired.
Remove module index - this repo has no modules and thus nothing is
generated.
Add job to publish documents.
Change-Id: Ida269f9755099f32a12f46082b529311ecb7e2b6
2b1c945b45