Look into total_ips_on_port quota and discover why it is not working

We have at least three separate IP address quotas:
1) Total ip's per port
2) Total fixed_ip's per port
3) Total shared_ip's per port
total_ips_per_port is the umbrella quota and governs all other ip address quotas:
https://github.com/openstack/quark/blob/master/quark/plugin_modules/ip_addresses.py#L32-L34
So it appears that this quota is only being enforced on isolated networks (see linked issues), but this should be enforced for all pubnet, servicenet, and isolated networks as defined in the link above.
It also appears that we are missing unit tests verifying that this quota is doing its job, this needs to be fixed.
Reach peeps eventually want to bill for additional IP's, but they need these quotas enforced to protect our VM's from going over the character limit in XenStore.