[Doc] openstackdocstheme starlingxdocs theme

Enable starlingxdocs theme support for:

- Documentation
- Release Notes

Additionally add in zuul post jobs:

- publish-stx-releasenotes

Depends-On: https://review.openstack.org/#/c/611761/
Change-Id: I1483c490192f9a44947e2e9e370efdd3bdf716d9
Signed-off-by: Abraham Arce <abraham.arce.moreno@intel.com>

.zuul.yaml

@@ -15,3 +15,4 @@
     post:
       jobs:
         - publish-stx-tox
+        - publish-stx-releasenotes

doc/requirements.txt

@@ -1,5 +1,5 @@
 sphinx>=1.6.2
-openstackdocstheme>=1.19.0 # Apache-2.0
+openstackdocstheme>=1.26.0 # Apache-2.0
 
 # Release Notes documentation
 reno>=0.1.1 # Apache2

doc/source/conf.py

@@ -82,7 +82,7 @@ pygments_style = 'sphinx'
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'alabaster'
+html_theme = 'starlingxdocs'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the

releasenotes/source/conf.py

@@ -93,7 +93,7 @@ pygments_style = 'sphinx'
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'alabaster'
+html_theme = 'starlingxdocs'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the