
Add unit tests for OomWatcher that actually test the logic defined in the `Start` method. As a result of an earlier refactor, its now trivial to mock the OOMInstance events which the `oom_watcher` is supposed to be watching.
Add unit tests for OomWatcher that actually test the logic defined in the `Start` method. As a result of an earlier refactor, its now trivial to mock the OOMInstance events which the `oom_watcher` is supposed to be watching.