Fix tox -e docs build

The docs target in tox was failing because it was still using
oslosphinx.  This patch replaces it with openstackdocstheme.

Change-Id: I4b6a93a306441f25d333889eaab3e9bbab3974c6
Story: 2005767
Task: 33481

doc/source/conf.py

@@ -15,8 +15,6 @@ import datetime
 import os
 import sys
 
-import sphinx_rtd_theme
-
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
@@ -32,7 +30,7 @@ import sphinx_rtd_theme
 extensions = ['sphinx.ext.autodoc',
               'sphinx.ext.todo',
               'sphinx.ext.viewcode',
-              'oslosphinx',
+              'openstackdocstheme',
               'yasfb',
              ]
 
@@ -104,8 +102,7 @@ man_pages = []
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 # html_theme = 'nature'
-html_theme = "sphinx_rtd_theme"
-html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
+html_theme = "openstackdocs"
 
 
 # Theme options are theme-specific and customize the look and feel of a theme

requirements.txt

@@ -1,7 +1,5 @@
-oslosphinx>=2.2.0.0a2
-pbr>=0.6,!=0.7,<1.0
-sphinx>=1.1.2,<1.2
-sphinx_rtd_theme
-testrepository>=0.0.18
+openstackdocstheme
+sphinx>=2.0.0
+stestr>2.0.0 # Apache-2.0
 testtools>=0.9.34
-yasfb>=0.5.1
+yasfb>=0.8.0