Comment 18 for bug 1453662

 (/Stage[main]/Openstack::Controller/Openstack::Network::Create_network[net04_ext]/Neutron_subnet[net04_ext__subnet]/cidr) change from 192.168.15.0/24 to 192.168.15.131/24 failed: Property cidr does not support being updated
We should either fix the provider to evaluate a real_cidr that is a network address (and not a specific IP + cidr notation) or generate a clean address to send the provider