Use openstackdocstheme for docs and release notes

Replace the usage of oslosphinx with openstackdocstheme and follow the
porting guide[1].

[1]
https://specs.openstack.org/openstack/docs-specs/specs/pike/os-manuals-migration.html

Change-Id: I8199b787c05406ba3997fdfe26d2bfcd31b329b4
diff --git a/doc/source/conf.py b/doc/source/conf.py
index ed05ed7..1221df1 100755
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -22,7 +22,7 @@
 extensions = [
     'sphinx.ext.autodoc',
     #'sphinx.ext.intersphinx',
-    'oslosphinx'
+    'openstackdocstheme',
 ]
 
 # autodoc generation is a bit aggressive and a nuisance when doing heavy
@@ -56,6 +56,7 @@
 # html_theme_path = ["."]
 # html_theme = '_theme'
 # html_static_path = ['static']
+html_theme = 'openstackdocs'
 
 # Output file base name for HTML help builder.
 htmlhelp_basename = '%sdoc' % project
@@ -72,3 +73,8 @@
 
 # Example configuration for intersphinx: refer to the Python standard library.
 #intersphinx_mapping = {'http://docs.python.org/': None}
+
+# openstackdocstheme options
+repository_name = 'openstack/keystone-tempest-plugin'
+bug_project = 'keystone'
+bug_tag = 'docs'
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index 23f6399..215098f 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -38,7 +38,7 @@
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
-    'oslosphinx',
+    'openstackdocstheme',
     'reno.sphinxext',
 ]
 
@@ -111,7 +111,7 @@
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'default'
+html_theme = 'openstackdocs'
 
 # 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
@@ -273,3 +273,8 @@
 
 # -- Options for Internationalization output ------------------------------
 locale_dirs = ['locale/']
+
+# openstackdocstheme options
+repository_name = 'openstack/keystone-tempest-plugin'
+bug_project = 'keystone'
+bug_tag = 'releasenotes'
diff --git a/test-requirements.txt b/test-requirements.txt
index 64f3df7..b2051c9 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,7 +5,7 @@
 hacking>=0.12.0,<0.13 # Apache-2.0
 
 sphinx!=1.6.1,>=1.5.1 # BSD
-oslosphinx>=4.7.0 # Apache-2.0
+openstackdocstheme>=1.17.0  # Apache-2.0
 
 # releasenotes
 reno>=1.8.0 # Apache-2.0