Add packers for CaloAdc and CaloDigit objects.

Add packers for CaloAdc and CaloDigit objects. Using CLID = 1542 and 1543, respectively

Modified code :

• Event : PackedCaloDigit.h & PackedCaloAdc.h
• src/lib : PackedCaloDigit.cpp & PackedCaloAdc.cpp
• src/component : add instances in Packers.cpp / UnPackers.cpp / Checkers.cpp
• dict/ : PackedEventDict.{h,xml}