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: I3ac8a5cc20e27458e1ed806658a36d6e6952da3d

lower-constraints.txt

@@ -23,7 +23,7 @@ MarkupSafe==1.0
 mccabe==0.2.1
 mock==2.0.0
 mox3==0.20.0
-openstackdocstheme==1.18.1
+openstackdocstheme==1.20.0
 os-client-config==1.28.0
 os-testr==1.0.0
 oslotest==3.2.0

releasenotes/source/conf.py

@@ -65,7 +65,6 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = 'VirtualBMC Release Notes'
 copyright = '2018, Ironic Developers'
 author = 'Ironic Developers'
 
@@ -139,24 +138,6 @@ htmlhelp_basename = 'VirtualBMCReleaseNotesdoc'
 
 # -- 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': '',
-
-    # Latex figure (float) alignment
-    #
-    # 'figure_align': 'htbp',
-}
-
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).

test-requirements.txt

@@ -9,7 +9,7 @@ doc8>=0.6.0 # Apache-2.0
 python-subunit>=1.0.0 # Apache-2.0/BSD
 sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7' # BSD
 sphinx!=1.6.6,!=1.6.7,>=1.6.2;python_version>='3.4' # BSD
-openstackdocstheme>=1.18.1 # Apache-2.0
+openstackdocstheme>=1.20.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD