Add documentation for auto-provisioning
Add documentation for auto-provisioning

We need some concrete examples that describe how auto-provisioning
works.

bp shadow-mapping

Change-Id: I503316840baa84b4bad7824f599dc69da6044925

rajalokan/keystone,rajalokan/keystone,openstack/keystone,ilay09/keystone,ilay09/keystone,mahak/keystone,rajalokan/keystone,openstack/keystone,mahak/keystone,ilay09/keystone,openstack/keystone,mahak/keystone