Modify the response example in test_subnetpools_client

Because some response parameters are missing,
modify the response example in test_subnetpools_client.
Please refer to:
https://docs.openstack.org/api-ref/network/v2/index.html#list-subnet-pools


Change-Id: I34ac81d19a38bdf3c5fbc58b9938e04ed8cde6df
1 file changed