Update doc theme for barbican-specs

Update the theme used in the barbican-specs documentation to the
latest from oslosphinx. This will help create a more common look
and feel throughout specs.openstack.org.

Change-Id: I29157520915b0952ec650dcfc389667ceaf9b88a

doc/source/conf.py

@@ -32,6 +32,7 @@ extensions = ['sphinx.ext.autodoc',
               'sphinx.ext.intersphinx',
               'sphinx.ext.todo',
               'sphinx.ext.viewcode',
+              'oslosphinx',
              ]
 
 todo_include_todos = True
@@ -101,7 +102,7 @@ html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
 # 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
 # documentation.
-#html_theme_options = {}
+html_theme_options = {'incubating': True}
 
 # Add any paths that contain custom themes here, relative to this directory.
 #html_theme_path = []

requirements.txt

@@ -1,4 +1,5 @@
 docutils==0.9.1
+oslosphinx>=2.2.0.0a2
 pbr>=0.6,!=0.7,<1.0
 sphinx>=1.1.2,<1.2
 sphinx_rtd_theme