Code review comment for ~sajoupa/charm-telegraf:snap-support

Hi Laurent,

Did you run `make test` as root?
I just ran `make unittest` as non-root, it will pop up dialogues to ask for authentication.
You may need to add this line in unit_tests/test_telegraf.py::setup:

monkeypatch.setattr(telegraf.host, 'service_pause', lambda svc: None)