[FV0] Reenable FV0, adjust laser task to follow dataformat changes in O2

[mslupeck]

Also unified the formatting between DigitQCTask and it's derivative: DigitQCTaskLaser

[mslupeck]

Hi @sandor-lokos
I've changed the formatting of DigitQCTaksLaser so that it is easier to compare it with DigitQCTask - I hope you don't mind.
But the only difference, I could see (except change of class name), is in line 374:
// mHistAverageTimeA->Fill(digit.mTriggers.timeA);
This line is not commented in DigitQCTask. Is it intentional?

[sandor-lokos]

Hi @mslupeck ,
I don't mind at all. In fact, I didn't even touch that file, I created the custom TH1ReductorLaser module and only copy the already existing DigitQcTask module to DigitQcTaskLaser to separate the latter from the former and leave open the way for further improvements.