Fix openstackdocstheme options for api-ref

Initialize the parameter for current openstackdocstheme so that report a
bug feature works and displays all parameter including git URL and SHA.

We need to add openstackdocstheme as extension so that the parameter are
properly initialized. html_context is not needed anymore. The display of
time of last commit is done by openstackdocstheme.

Closes-Bug: #1743728
Change-Id: I415cacbf0d8d93ad45cc317ab3552a83d3cf69de

api-ref/source/conf.py

@@ -23,18 +23,14 @@
 # serve to show the default.
 
 import os
-import subprocess
 import sys
-import warnings
-
-import openstackdocstheme
 
 extensions = [
     'os_api_ref',
+    'openstackdocstheme',
 ]
 
 html_theme = 'openstackdocs'
-html_theme_path = [openstackdocstheme.get_html_theme_path()]
 html_theme_options = {
     "sidebar_mode": "toc",
 }
@@ -65,6 +61,11 @@ master_doc = 'index'
 project = u'Networking API Reference'
 copyright = u'2010-present, OpenStack Foundation'
 
+# openstackdocstheme options
+repository_name = 'openstack/neutron-lib'
+bug_project = 'neutron'
+bug_tag = 'api-ref'
+
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
@@ -75,10 +76,6 @@ release = version_info.release_string()
 # The short X.Y version.
 version = version_info.version_string()
 
-# Config logABug feature
-# html_context allows us to pass arbitrary values into the html template
-html_context = {"bug_tag": "api-ref", "bug_project": "neutron"}
-
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
 #
@@ -153,13 +150,7 @@ pygments_style = 'sphinx'
 # If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
 # using the given strftime format.
 # html_last_updated_fmt = '%b %d, %Y'
-git_cmd = ["git", "log", "--pretty=format:'%ad, commit %h'", "--date=local",
-           "-n1"]
-try:
-    html_last_updated_fmt = subprocess.check_output(git_cmd).decode('utf-8')
-except Exception:
-    warnings.warn('Cannot get last updated time from git repository. '
-                  'Not setting "html_last_updated_fmt".')
+html_last_updated_fmt = '%Y-%m-%d %H:%M'
 
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.