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.

Disable openstackdocs_auto_name to use 'project' variable as name.

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.

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.

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

Change-Id: I51ed3c145a96259b9439d0ffda4685bff9721177

doc/source/conf.py

@@ -44,9 +44,10 @@ master_doc = 'index'
 project = 'os-win'
 copyright = '2015, Cloudbase Solutions Srl'
 # openstackdocstheme options
-repository_name = 'openstack/os-win'
-bug_project = 'os-win'
-bug_tag = ''
+openstackdocs_repo_name = 'openstack/os-win'
+openstackdocs_auto_name = False
+openstackdocs_bug_project = 'os-win'
+openstackdocs_bug_tag = ''
 
 # If true, '()' will be appended to :func: etc. cross-reference text.
 add_function_parentheses = True
@@ -56,7 +57,7 @@ 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 --------------------------------------------------
 

lower-constraints.txt

@@ -23,7 +23,7 @@ mox3==0.20.0
 msgpack-python==0.4.0
 netaddr==0.7.18
 netifaces==0.10.4
-openstackdocstheme==1.31.2
+openstackdocstheme==2.2.1
 os-client-config==1.28.0
 oslo.concurrency==3.26.0
 oslo.config==5.2.0
@@ -43,13 +43,13 @@ python-mimeparse==1.6.0
 python-subunit==1.0.0
 pytz==2013.6
 PyYAML==3.12
-reno==2.5.0
+reno==3.1.0
 requests==2.14.2
 requestsexceptions==1.2.0
 rfc3986==0.3.1
 six==1.10.0
 snowballstemmer==1.2.1
-Sphinx==1.6.2
+Sphinx==2.0.0
 sphinxcontrib-websupport==1.0.1
 stestr===2.0.0
 stevedore==1.20.0

releasenotes/source/conf.py

@@ -59,9 +59,10 @@ project = u'OS-WIN Release Notes'
 copyright = u'2015, Winstackers Developers'
 
 # openstackdocstheme options
-repository_name = 'openstack/os-win'
-bug_project = 'os-win'
-bug_tag = ''
+openstackdocs_repo_name = 'openstack/os-win'
+openstackdocs_auto_name = False
+openstackdocs_bug_project = 'os-win'
+openstackdocs_bug_tag = ''
 
 # Release notes do not need a version in the title, they span
 # multiple versions.
@@ -100,7 +101,7 @@ 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 = []

test-requirements.txt

@@ -7,12 +7,12 @@ hacking>=3.0.1,<3.1.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 ddt>=1.0.1 # MIT
 docutils>=0.11 # OSI-Approved Open Source, Public Domain
-sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
+sphinx>=2.0.0,!=2.1.0 # BSD
 oslo.config>=5.2.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
 stestr>=2.0.0 # Apache-2.0
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
-openstackdocstheme>=1.31.2 # Apache-2.0
+openstackdocstheme>=2.2.1 # Apache-2.0
 # releasenotes
-reno>=2.5.0 # Apache-2.0
+reno>=3.1.0 # Apache-2.0