Update document theme

This commit updates the document theme to the newest one.

Change-Id: Icb9330c0f80660b9aa61e40b0e586201e2acc9f2

doc/source/conf.py

@@ -16,6 +16,8 @@ import subprocess
 import sys
 import os
 
+import openstackdocstheme
+
 # 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.
@@ -107,7 +109,7 @@ modindex_common_prefix = ['qa-specs.']
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'nature'
+html_theme = 'openstackdocs'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
@@ -115,7 +117,7 @@ html_theme = 'nature'
 #html_theme_options = {}
 
 # Add any paths that contain custom themes here, relative to this directory.
-#html_theme_path = []
+html_theme_path = [openstackdocstheme.get_html_theme_path()]
 
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".

requirements.txt

@@ -3,3 +3,4 @@ docutils>=0.11,!=0.13.1  # OSI-Approved Open Source, Public Domain
 oslosphinx>=2.5.0,!=3.4.0  # Apache-2.0
 sphinx>=1.1.2,!=1.2.0,!=1.3b1,<1.3  # BSD
 yasfb>=0.5.1
+openstackdocstheme>=1.5.0 # Apache-2.0