Bug 745904 (extratests): Allow test opt-out - Forcing tests for everything means we have to know everything about   the enviroment in our tests, which makes them fragile. - So we need to allow tests to not-test things
Bug 745904 (extratests): Allow test opt-out
- Forcing tests for everything means we have to know everything about
  the enviroment in our tests, which makes them fragile.
- So we need to allow tests to not-test things

mozilla/gcli,joewalker/gcli,joewalker/gcli,mozilla/gcli,mozilla/gcli