Comment 22 for bug 1553595

I'm referencing this bug here. It seems this Tempest test has a bug.

https://review.openstack.org/#/c/288959/
https://github.com/openstack/tempest/commit/6919da4be56850d923345dd870da8ecc57484a72

We run Tempest against our public cloud to make sure everything is running smoothly, our `public_network_id` is an external, shared network. Therefore, as per the Neutron policy, a user *will* be able to retrieve the subnets for that network because it is both shared and external.

I would be more than happy to contribute a fix, but would love guidance on how the Neutron team wants to take this.