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
* 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: I4fe9ea8ee88dad673849cbb9e1a469ca12705740

doc/requirements.txt

@@ -2,5 +2,5 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 sphinx>=2.0.0,!=2.1.0 # BSD
-openstackdocstheme>=2.0.0 # Apache-2.0
-reno>=2.5.0 # Apache-2.0
+openstackdocstheme>=2.2.1 # Apache-2.0
+reno>=3.1.0 # Apache-2.0

doc/source/conf.py

@@ -45,7 +45,7 @@ add_function_parentheses = True
 add_module_names = True
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
+pygments_style = 'native'
 
 # -- Options for HTML output --------------------------------------------------
 
@@ -58,9 +58,9 @@ html_theme = 'openstackdocs'
 #html_theme_path = [openstackdocstheme.get_html_theme_path()]
 
 # openstackdocstheme options
-repository_name = 'openstack/python-muranoclient'
-bug_project = 'python-muranoclient'
-bug_tag = ''
+openstackdocs_repo_name = 'openstack/python-muranoclient'
+openstackdocs_bug_project = 'python-muranoclient'
+openstackdocs_bug_tag = ''
 
 # Output file base name for HTML help builder.
 htmlhelp_basename = 'python-muranoclientdoc'

lower-constraints.txt

@@ -39,7 +39,6 @@ munch==2.1.0
 murano-pkg-check==0.3.0
 netaddr==0.7.18
 netifaces==0.10.4
-openstackdocstheme==2.0.0
 openstacksdk==0.11.2
 os-client-config==1.28.0
 os-service-types==1.2.0
@@ -74,7 +73,6 @@ python-mimeparse==1.6.0
 python-subunit==1.0.0
 pytz==2013.6
 PyYAML==3.12
-reno==2.5.0
 requests==2.14.2
 requests-mock==1.1.0
 requestsexceptions==1.2.0
@@ -82,8 +80,6 @@ rfc3986==0.3.1
 semantic-version==2.3.1
 simplejson==3.5.1
 snowballstemmer==1.2.1
-Sphinx==2.0.0
-sphinxcontrib-websupport==1.0.1
 stevedore==1.20.0
 tempest==17.1.0
 stestr==2.0.0

releasenotes/source/conf.py

@@ -93,7 +93,7 @@ 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 = []
@@ -118,9 +118,9 @@ html_theme = 'openstackdocs'
 # html_theme_path = [openstackdocstheme.get_html_theme_path()]
 
 # openstackdocstheme options
-repository_name = 'openstack/python-muranoclient'
-bug_project = 'python-muranoclient'
-bug_tag = ''
+openstackdocs_repo_name = 'openstack/python-muranoclient'
+openstackdocs_bug_project = 'python-muranoclient'
+openstackdocs_bug_tag = ''
 
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".