Control the number of drift chambers

update CEPCv4 ECAL and HCAL xml

SIM: modify id and offset for Ecal and Hcal

Remove default argument values from friend member functions

gcc 9.3.0 flags these as errors (-fpermissive), because a friend declaration
with default arguments must also be a definition.

update Pandora detector geometry info reading

SIM: fix on option of CEPCv4 Hcal

Add two Endcaps

WIP: Set the Random Seed in DetSimAlg

WIP: as the random seed will be reset in the initialization of Gaudi's HEP random engine, we need to set the seed again.

Conflicts:
	Digitisers/DCHDigi/src/DCHDigiAlg.cpp

Fix compiler warning in IGeomSvc and GeomSvc

SIM: add geometry option for CEPCv4 to support new MDI

Remove singleton of message in RecGenfitAlg