make current tests pass

It looks like some of the tests in master do not pass due to a wrong class name and a couple other minor things. I figured I'd get these passing before any more work is put into this app.

Also, is there a way to switch out the adapter to the FixtureAdapter with fixture data for the test environment? Right now it looks like the tests are using production data from firebase. I'll try to figure this out in the meantime but my Ember skills is honestly pretty amateur so any advice is appreciated.