Updating to use `audit` instead of `control` when appropriate

I'm questioning whether we even need this change - I tried to find more opportunities to switch from using `control` to using `audit` but it didn't make sense.  We already have `audit` and `control_group` event notifications and updating both to `audit` seemed more confusing.

@sersut @mcquin let me know if you think I should just dump these changes.

Its making me realize that `audit` refers more to the phase and `control_group` refers to the items we perform in the audit phase.