Updated openstack/openstack
Project: openstack/horizon  734105534cda444b4cd438eea004183002539055

Update doc/source/conf.py

* Exclude test files from source code index
* Add an index to jump to sub indexes in source code index
* Ensure the order of source code index by using an array
  rather than a dict.

Change-Id: I5c28a3e29c9c0b0332732d3f598030a77536563a