Bug 732923 - Fix log message for filtered wifi access points.
Bug 732923 - CoreLocation provider shouldn't implement nsIGeolocationUpdate
Bug 732923 - Make watchPosition timeouts adhere to spec.
Bug 732923 - Make the network provider less spammy during tests.

This seems to improve the situation of the test timeouts.

Open questions:

- Why is test_timerRestartWatch.html so critical? Because it takes longer?
- Why are the XHR not happening past a certain point? Is there a limit
  somewhere?
- Reproduce this more consistently on master!