Added MC filtering options for prompt D*->D0pi, D0->pipipi0

@malexand

Added MC filtering options for prompt D*->D0pi, D0->pipipi0 for 2015-18.

To-Do list:

• Find out whether the lines:

  caloProtoReprocessLocs = [ "/Event/pRec/ProtoP#99", "/Event/pRec/Calo#99" ]
  SelDSTWriterConf['default'].extraItems += caloProtoReprocessLocs

  are necessary in all years (here suggests only 2015+16, but maybe its not so important anyway)

  Resolution: Only required for 15/16

• Ensure trigger selection is correct: energy test analysis also use Hlt2Global_TIS - should that be added?

  Resolution: Trigger line implements OR of previous HLT2 selection and Hlt2Global_TIS (and KKpi/Kpipi lines) - use this instead of pre-filter

• Test new options files

• Calculate retention rates