go-sdk: add support for ipRange and floatingIpRange.
go-sdk: add support for ipRange and floatingIpRange.

- admin should be able to specify these two CIDRs if sdn is enabled.

Change-Id: Icf37b0f7b2b8611d133b0d6a2e78910d6ba48ae3

vmware/photon-controller-go-sdk,vmware/photon-controller-go-sdk