Description of problem: Create a draft document for Framework for Upgrades (13 to 16.2-beta)
This draft will be based on the current FFU doc Framework for Upgrades (13 to 16.1): https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/16.1/html-single/framework_for_upgrades_13_to_16.1/index