WeightNameCleanup: Remove '-' from generator weight names.
Some samples (e.g. [1]) have -
in the generator weight variation names: generatorWeight_GEN_muR1000000E+00_muF5000000E-01
This can cause code that uses this name to crash. To prevent this, we would like to remvove this special character from the name. The +
character was removed in a previous merge request.
[1] mc20_13TeV.361601.PowhegPy8EG_CT10nloME_AZNLOCTEQ6L1_WZlvll_mll4.deriv.DAOD_PHYS.e4475_s3681_r13145_p5440