Demote warning in MissingMassProb for tau_type=6
In analysis jobs running with the MMC 2016 tuning, we get a fair amount of warnings
DiTauMassTools WARNING ---- WARNING in MissingMassCalculator::dTheta3d_probabilityFast() ----
DiTauMassTools WARNING ..... wrong tau_type=6
DiTauMassTools WARNING ..... returning prob=0.000000
DiTauMassTools WARNING ____________________________________________________________
Based on previous discussions, it was suggested to silence the warning
Edited by Thomas Strebler