MuonSimEvent → MuonIdHelpers Relation

File in MuonSpectrometer/MuonSimEvent/MuonSimEvent	Includes file in MuonSpectrometer/MuonIdHelpers
MM_SimIdToOfflineId.h	MuonIdHelpers / MmIdHelper.h
sTgcSimIdToOfflineId.h	MuonIdHelpers / sTgcIdHelper.h