Document flat limit enforcement model
Document flat limit enforcement model

This commit describes enforcement models and documents the only
enforcement model currently supported, which is flat enforcement.

bp unified-limits

Change-Id: I37aa7b57ce5e52e995a7ebc0db94dd0caccea461

openstack/keystone,mahak/keystone,mahak/keystone,openstack/keystone,mahak/keystone,openstack/keystone