Switch from oslosphinx to openstackdocstheme

As part of the docs migration work[0] for Pike we need to switch to use
the openstackdocstheme.

[0]https://review.openstack.org/#/c/472275/

Change-Id: I18e7db0410ffa28d6a62a1adfb1a7eabe610c950
diff --git a/doc/source/conf.py b/doc/source/conf.py
index 33c2cc3..ddb1d45 100755
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -23,7 +23,7 @@
 extensions = [
     'sphinx.ext.autodoc',
     #'sphinx.ext.intersphinx',
-    'oslosphinx'
+    'openstackdocstheme'
 ]
 
 # autodoc generation is a bit aggressive and a nuisance when doing heavy
@@ -55,8 +55,16 @@
 # The theme to use for HTML and HTML Help pages.  Major themes that come with
 # Sphinx are currently 'default' and 'sphinxdoc'.
 # html_theme_path = ["."]
-# html_theme = '_theme'
 # html_static_path = ['static']
+html_theme = 'openstackdocs'
+
+# openstackdocstheme options
+repository_name = 'openstack/patrole'
+bug_project = 'patrole'
+bug_tag = ''
+
+# Must set this variable to include year, month, day, hours, and minutes.
+html_last_updated_fmt = '%Y-%m-%d %H:%M'
 
 # Output file base name for HTML help builder.
 htmlhelp_basename = '%sdoc' % project