Updated openstack/openstack
Project: openstack/cliff  ac804abd3f7029e520b78d29aa9a2ff5dbbfb94b

Bring doc build up to standard

Move the requirements definitions and documentation files to the
standard places used by other OpenStack projects so our doc publishing
jobs will work.

Remove the todo extension and all todo items from the documentation.

Change-Id: Iea630d827976fe517afacf4e373b3a125efff9c9