Code review comment for lp:~savilerow-team/savilerow/test-cleanup-and-py3

Also not that this MP does include some cleanup to the dconf test, which is frankly still less than ideal. However, the way this test is written must change imminently as the new dconf architecture is ready soon (since u-t-c-h has finally landed), so it doesn't make sense to put too much time fixing that test quite yet