* cs_network_offering: streamline docs a bit
* cs_network_offering: format traffic type as returned by API
* cs_network_offering: rename return to service_offering_id
* cs_network_offering: ensure absent tests don't require anyting else than name
* cs_network_offering: beautify the default_egress_policy param
* cs_network_offering: test enabling/disabling with existing syntax
* cs_network_offering: rename service_provider_list to service_providers
* cs_network_offering: allow update max_connections
* cs_network_offering: extend returns
* cs_network_offering: extend tests with max_connections
