Bug 1098339 - Telemetry report automation

We can make the call dynamically as you said me but I think is better of this way because it's better to define explicitly the new reports to avoid errors in reporters calls (e.g if you put a new call to 'incomingCallWithFxA' when you wanted to call 'incomingCallsWithFxA' currently you'll have an error instead of adding a new report).

Another thing more is that, it's better to have to defined explicitly the type of the new report instead you have got to deduce it