Update document theme and section headers
This commit updates the document theme. It is clear, simple, up-to-date
and beautiful. And this commit also updates section headers to fix the
document index.
Change-Id: Ia1e8e16e5f5ddb06e4c4ccb4979b0750b88a4db4
diff --git a/test-requirements.txt b/test-requirements.txt
index 13950bd..beb456d 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -10,3 +10,4 @@
coverage>=4.0 # Apache-2.0
oslotest>=1.10.0 # Apache-2.0
flake8-import-order==0.11 # LGPLv3
+openstackdocstheme>=1.5.0 # Apache-2.0