Prettified all remaining HTML files

After prettifying all index files with change
I795af7349879867180fa58cbf0689cb979870143  this change
prettified all remaining HTML files also using Beautiful
Soup with the following script.

https://github.com/berendt/openstack-development/blob/master/prettify.py

Change-Id: Ie1bb4de5f8d1c9a9566d8781a4446f1e6e602963