Fix for 500s

2 quota fixes needed for Production release.

I'm probably going to have to do some flake8 fixes as well. They were *way* more locally than I was expecting (many not in my code change), so I'm wondering what Travis is going to say.
I wonder if there is benefit from moving the check for `len(new_subnet["routes"]) + len(host_routes)` before the loop for each scenario. Thoughts?