Divide MDT HPTDC ADC/TDC by 4

Divide the ADC/TDC by 4 for MDT chambers which use HPTDC chip (BMG, sMDT BIS7), so these chambers have same ticksize as other MDTs. Do change in MuonMDT_CnvTool/MdtRdoToPrepDataToolCore where MdtDigits are put into PRD. Correspondingly, remove special treatment of BMG in MdtCalibSvc/MdtCalibrationTool (special ticksize). This change will permit proper reconstruction of HPTDC chambers, timeslew correction will work (based on ADC), and ADC cuts will now work.