Comment 3 for bug 1632460

From a related bug in nova client:
https://bugs.launchpad.net/python-novaclient/+bug/1731323/comments/4

"The security_group quota and usage in nova is only related to security groups created with nova-network. When using neutron, the quotas and usage are handled by neutron, not nova."

I've pasted Ankur's comment into their ticket.