Switch to newer openstackdocstheme and reno versions3.2.0

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
* Fix some rendering problems

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.

Change pygments_style to 'native' since old theme version always used
'native' and the theme now respects the setting and using 'sphinx' can
lead to some strange rendering.

See also
http://lists.openstack.org/pipermail/openstack-discuss/2020-May/014971.html

Change-Id: Ie4aec288c74b9bd8d8d117f4bc2e0282cea4db90

1 files changed, 7 insertions, 7 deletions

diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index 75aab4d..d20e2f4 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -29,8 +29,6 @@
 # documentation root, use os.path.abspath to make it absolute, like shown here.
 # sys.path.insert(0, os.path.abspath('.'))
 
-import openstackdocstheme
-
 # -- General configuration ------------------------------------------------
 
 # If your documentation needs a minimal Sphinx version, state it here.
@@ -41,6 +39,7 @@ import openstackdocstheme
 # ones.
 extensions = [
     'reno.sphinxext',
+    'openstackdocstheme'
 ]
 
 # Add any paths that contain templates here, relative to this directory.
@@ -59,6 +58,11 @@ master_doc = 'index'
 project = u'glanceclient Release Notes'
 copyright = u'2016, Glance Developers'
 
+openstackdocs_repo_name = 'openstack/python-glanceclient'
+openstackdocs_bug_project = 'python-glanceclient'
+openstackdocs_bug_tag = ''
+openstackdocs_auto_name = False
+
 # Release notes are not versioned, so we don't need to set version or release
 version = ''
 release = ''
@@ -93,7 +97,7 @@ exclude_patterns = []
 # show_authors = False
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
+pygments_style = 'native'
 
 # A list of ignored prefixes for module index sorting.
 # modindex_common_prefix = []
@@ -113,10 +117,6 @@ html_theme = 'openstackdocs'
 # documentation.
 # html_theme_options = {}
 
-# Add any paths that contain custom themes here, relative to this directory.
-# html_theme_path = []
-html_theme_path = [openstackdocstheme.get_html_theme_path()]
-
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".
 # html_title = None