Comment 0 for bug 1537054

Given multirack environment:

Rack01 (default):
 * slave01 = compute
 * slave02 = cinder

Rack02 (custom):
 * slave03..05 = controllers

Instances will not be able to reach internet and will not be reachable from public/private networks IF floating range configured as a part of `public` network of rack with no controllers. So in this case correct to configure float range as part of public net of rack2.

There few issues with this:
1. Issue are not described in our documentation: https://docs.mirantis.com/openstack/fuel/fuel-master/operations.html#configuring-multiple-cluster-networks
2. Fuel are not validate this case BEFORE deployment (both on UI or backend)