Switch to newer openstackdocstheme version

Switch to openstackdocstheme 2.2.1 version. Using
this version 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: I132d4efb3955ba3425426a4bb617dc5cd0d86944

doc/source/conf.py

@@ -12,7 +12,6 @@
 # serve to show the default.
 
 import datetime
-import subprocess
 import sys
 import os
 
@@ -38,7 +37,7 @@ extensions = ['redirect',
              ]
 
 # Feed configuration for yasfb
-feed_base_url = 'http://specs.openstack.org/openstack/murano-specs'
+feed_base_url = 'https://specs.openstack.org/openstack/murano-specs'
 feed_author = 'OpenStack Murano Team'
 
 todo_include_todos = True
@@ -91,11 +90,16 @@ add_module_names = False
 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 = ['murano-specs.']
 
+# openstackdocstheme options
+openstackdocs_repo_name = 'openstack/murano-specs'
+openstackdocs_bug_project = 'murano'
+openstackdocs_bug_tag = ''
+
 # -- Options for man page output ----------------------------------------------
 man_pages = []
 

requirements.txt

@@ -3,8 +3,8 @@
 # process, which may cause wedges in the gate later.
 
 pbr>=2.0.0,!=2.1.0 # Apache-2.0
-sphinx>=1.6.1 # BSD
+sphinx>=2.0.0,!=2.1.0 # BSD
 testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=1.4.0 # MIT
 yasfb>=0.8.0
-openstackdocstheme>=1.32.0 # Apache-2.0
+openstackdocstheme>=2.2.1 # Apache-2.0