New data files for PU in FastSim, for 6_2_X

Signed-off-by: Andrea <andrea.giammanco@cern.ch>
Merge pull request #231 from giamman/13Tev-update-data-FastSimulation-PileUpProducer-for-62x-2nd-attempt

New data files for PU in FastSim, for 6_2_X