Move STGC and MM digit containers to use module hash
Update the STGC and MM containers to use module hash instead of detector element hash in order to have the same granularity as the RDO and PRD containers.
Also fixes an error where the STGC collection were initialized with a wrong hashID - Identifier pair.
One commit is only to clean up the bad indentation in sTgcDigitizationTool and remove obsolete commented out code. Some commented out code is still present as it might be used as a reference for future changes.
Adding @cchau