Unknown hazards not fully accounted for

[mattgarrish]

The hazards section only accounts for the single "unknown" hazard value, but we have unknown values now for each individual hazard type.

For the overall unknown output string, the check should also account for unknownFlashingHazard, unknownMotionSimulationHazard, and unknownSoundHazard being set, like is done for the three "no hazard" tests in the first step.