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.

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.

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.

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

Change-Id: Ic5ff4981e5ed09885fd2aaad7508d58d2b2cccc7

5 files changed, 19 insertions, 21 deletions

diff --git a/api-ref/source/conf.py b/api-ref/source/conf.py
index 665c9044..19e35cfc 100755
--- a/api-ref/source/conf.py
+++ b/api-ref/source/conf.py
@@ -36,9 +36,10 @@ html_theme = 'openstackdocs'
 html_theme_options = {
     "sidebar_mode": "toc",
 }
-repository_name = 'openstack/trove'
-bug_project = 'trove'
-bug_tag = ''
+openstackdocs_repo_name = 'openstack/trove'
+openstack_auto_name = False
+openstackdocs_bug_project = 'trove'
+openstackdocs_bug_tag = ''
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -93,7 +94,7 @@ add_module_names = False
 show_authors = False
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
+pygments_style = 'native'
 
 # -- Options for man page output ----------------------------------------------
 
diff --git a/doc/source/conf.py b/doc/source/conf.py
index 346fe4bb..7f7fa9a4 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -19,9 +19,10 @@ extensions = ['sphinx.ext.todo',
               'stevedore.sphinxext']
 
 # openstackdocstheme options
-repository_name = 'openstack/trove'
-bug_project = 'trove'
-bug_tag = ''
+openstackdocs_repo_name = 'openstack/trove'
+openstackdocs_bug_project = 'trove'
+openstack_auto_name = False
+openstackdocs_bug_tag = ''
 html_theme = 'openstackdocs'
 
 # Add any paths that contain templates here, relative to this directory.
@@ -69,7 +70,7 @@ add_module_names = True
 #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 = ['trove.']
@@ -114,10 +115,6 @@ modindex_common_prefix = ['trove.']
 # so a file named "default.css" will overwrite the builtin "default.css".
 # html_static_path = ['_static']
 
-# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
-# using the given strftime format.
-#html_last_updated_fmt = '%b %d, %Y'
-
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
 #html_use_smartypants = True
diff --git a/lower-constraints.txt b/lower-constraints.txt
index 81d33201..78d4ed37 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -67,7 +67,7 @@ networkx==1.11
 nose==1.3.7
 nosexcover==1.0.10
 openstack.nose-plugin==0.7
-openstackdocstheme==1.32.1
+openstackdocstheme==2.2.1
 openstacksdk==0.12.0
 os-api-ref==1.4.0
 os-client-config==1.29.0
@@ -128,7 +128,7 @@ python-troveclient==2.2.0
 pytz==2018.3
 PyYAML==3.12
 redis==2.10.0
-reno==2.5.0
+reno==3.1.0
 repoze.lru==0.7
 requests==2.18.4
 requestsexceptions==1.4.0
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index 5e847950..25398e44 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -43,10 +43,10 @@ extensions = [
 ]
 
 # openstackdocstheme options
-repository_name = 'openstack/trove'
-bug_project = 'trove'
-bug_tag = ''
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
+openstackdocs_repo_name = 'openstack/trove'
+openstack_auto_name = False
+openstackdocs_bug_project = 'trove'
+openstackdocs_bug_tag = ''
 html_theme = 'openstackdocs'
 
 # Add any paths that contain templates here, relative to this directory.
@@ -103,7 +103,7 @@ 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 = []
diff --git a/test-requirements.txt b/test-requirements.txt
index b86d58ea..7c558ef7 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -25,6 +25,6 @@ pylint==1.9.2 # GPLv2
 oslotest>=3.2.0 # Apache-2.0
 tenacity>=4.9.0  # Apache-2.0
 # Docs building
-openstackdocstheme>=1.32.1 # Apache-2.0
+openstackdocstheme>=2.2.1 # Apache-2.0
 os-api-ref>=1.4.0 # Apache-2.0
-reno>=2.5.0 # Apache-2.0
+reno>=3.1.0 # Apache-2.0