not optimal loop

[richbar88]

https://github.com/mmuellerstoffels/GBSTools/blob/7a20352a8b83e60f675273a79e43e3bfa5dd3385/GBSTool/GBSModel/Generator.py#L73-L74
This loop is not optimal.
Suggestion: Use for example “for fuelCurvePPuInpt_, fuelCurveMFInpt_ in zip(fuelCurvePPuInpt,
fuelCurveMFInpt)”. Than instead of fuelCurvePPuInpt[idx] use fuelCurvePPuInpt_.