Bump the openstackdocstheme extension to 1.20

Some options are now automatically configured by the version 1.20:
- project
- html_last_updated_fmt
- latex_engine
- latex_elements
- version
- release.

Change-Id: I2e12b3da4686bf9f18d55fbb629d8a4525f3bc8d
diff --git a/doc/source/conf.py b/doc/source/conf.py
index c3cdb16..3a4cff9 100755
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -23,7 +23,6 @@
 extensions = [
     'sphinx.ext.autodoc',
     'openstackdocstheme',
-    #'sphinx.ext.intersphinx',
 ]
 
 # autodoc generation is a bit aggressive and a nuisance when doing heavy
@@ -37,7 +36,6 @@
 master_doc = 'index'
 
 # General information about the project.
-project = u'openstack'
 copyright = u'2017, OpenStack Developers'
 
 # openstackdocstheme options
@@ -65,15 +63,15 @@
 html_theme = 'openstackdocs'
 
 # Output file base name for HTML help builder.
-htmlhelp_basename = '%sdoc' % project
+htmlhelp_basename = 'openstackdoc'
 
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass
 # [howto/manual]).
 latex_documents = [
     ('index',
-     '%s.tex' % project,
-     u'%s Documentation' % project,
+     'openstack.tex',
+     u'openstack Documentation',
      u'OpenStack Developers', 'manual'),
 ]
 
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index 66d6a9e..770396a 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -52,7 +52,6 @@
 master_doc = 'index'
 
 # General information about the project.
-project = u'Neutron Tempest Plugin Release Notes'
 copyright = u'2017, Neutron Tempest Plugin Developers'
 
 # openstackdocstheme options
@@ -60,16 +59,6 @@
 bug_project = 'neutron'
 bug_tag = ''
 
-# 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.
-#
-# The short X.Y version.
-# The full version, including alpha/beta/rc tags.
-release = ''
-# The short X.Y version.
-version = ''
-
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
 # language = None
@@ -196,17 +185,6 @@
 
 # -- Options for LaTeX output ---------------------------------------------
 
-latex_elements = {
-    # The paper size ('letterpaper' or 'a4paper').
-    # 'papersize': 'letterpaper',
-
-    # The font size ('10pt', '11pt' or '12pt').
-    # 'pointsize': '10pt',
-
-    # Additional stuff for the LaTeX preamble.
-    # 'preamble': '',
-}
-
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
diff --git a/test-requirements.txt b/test-requirements.txt
index 20b29f4..9650223 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -12,6 +12,6 @@
 oslotest>=3.2.0 # Apache-2.0
 stestr>=1.0.0 # Apache-2.0
 testtools>=2.2.0 # MIT
-openstackdocstheme>=1.18.1 # Apache-2.0
+openstackdocstheme>=1.20.0 # Apache-2.0
 # releasenotes
 reno>=2.5.0 # Apache-2.0