8e5c7503fc
Switch from oslosphinx to openstackdocstheme
That's what the OpenStack community is using today. Also with newer
Sphinx versions, the current approach does no longer build.
Re-add docs and requirements tests.
Switch to xena standard jobs.
Conflicts:
doc/requirements.txt
requirements.txt
test-requirements.txt
(cherry picked from commit 21a184bff2)
Change-Id: I3f93a400bb83f4a91bd77ebe69f609949cd43ca7