Use oslosphinx for docs site

This gets us the openstack theme

Change-Id: I679bbc36d58294ef14852a7938435eacf71321ed

doc/source/conf.py

@@ -4,7 +4,7 @@ import os
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = []
+extensions = ['oslosphinx']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']

test-requirements.txt

@@ -9,3 +9,4 @@ testrepository>=0.0.18
 
 # Doc requirements
 sphinx>=1.1.2,!=1.2.0,!=1.3b1,<1.3
+oslosphinx>=2.2.0  # Apache-2.0