Switch to newer openstackdocstheme and reno versions

Switch to openstackdocstheme 2.2.1 and reno 3.1.0 versions. Using
these versions will allow especially:
* Linking from HTML to PDF document
* Allow parallel building of documents

Update Sphinx version as well.

Remove docs requirements from lower-constraints, they are not needed
during install or test but only for docs building.

openstackdocstheme renames some variables, so follow the renames
before the next release removes them. A couple of variables are also
not needed anymore, remove them.

Set openstackdocs_pdf_link to link to PDF file. Note that
the link to the published document only works on docs.openstack.org
where the PDF file is placed in the top-level html directory. The
site-preview places the PDF in a pdf directory.

Set openstackdocs_auto_name to use 'project' as name.

Change-Id: I138d51ace230a434e76fbe9fbbe97e53212230f3

1 files changed, 4 insertions, 17 deletions

diff --git a/doc/source/conf.py b/doc/source/conf.py
index fbde9778e..5616d7a57 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -40,17 +40,6 @@ master_doc = 'index'
 project = u'kolla'
 copyright = u'2013-present, OpenStack Foundation'
 
-# 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.
-from kolla.version import version_info as kolla_version
-# The full version, including alpha/beta/rc tags.
-release = kolla_version.version_string_with_vcs()
-# The short X.Y version.
-version = kolla_version.canonical_version_string()
-
 # If true, '()' will be appended to :func: etc. cross-reference text.
 add_function_parentheses = True
 
@@ -76,9 +65,6 @@ html_theme_options = {
 # Output file base name for HTML help builder.
 htmlhelp_basename = '%sdoc' % project
 
-# Must set this variable to include year, month, day, hours, and minutes.
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
-
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass
 # [howto/manual]).
@@ -93,9 +79,10 @@ latex_documents = [
 latex_use_xindy = False
 
 # openstackdocstheme options
-repository_name = 'openstack/kolla'
-bug_project = 'kolla'
-bug_tag = ''
+openstackdocs_repo_name = 'openstack/kolla'
+openstackdocs_pdf_link = True
+openstackdocs_bug_project = 'kolla'
+openstackdocs_bug_tag = ''
 openstack_projects = [
     'kolla-ansible',
     'oslotest',