Code review comment for lp:~viswesn/juju-ci-tools/ensure_provider_cleanup

Some further queries about the data-structures used for storing errors.
I expanded on your question a bit, let me know what you think or if you would like more info.

Some test issues too. Make sure you're mocking the right thing, it's all too easy when mocking to produce false positives in your code that don't match reality when actually being run.