test: cleanup neutron security group

I kept running into partial-cleanups and other issues with the `create.yml` code and felt this would be a good chance to help re-stage the test environment when setting up and tearing it down.
If you run ansible with -vv verbosity, you'll see the return json from every task. My concern is that ignore_errors generally results in red output but passing task, which makes it hard to look at a playbook scrollback and spot the actual failure.