Comment 10 for bug 1335885

This used to be just an annoying warning, but we are now seeing bootstrap failures over it.

To boil it down:

1. Amulet (or user) bootstraps, deploys, confirms ok, destroys.

2. 00:36:56.142 WARNING cannot delete security group "juju-osci-sv07". Used by another environment?
("I couldn't delete this named thing, probably because it is in use.")

3. Amulet (or user) issues bootstrap command, plans to deploy something different and confirm it.

4. 00:36:56.143 ERROR failed to bootstrap environment: cannot start bootstrap instance: cannot set up groups: failed to create a security group with name: juju-osci-sv07
("I couldn't create this named thing, probably because it already exists.")