CA: a setter to disable a particular tracking station is added

An option of disabling a tracking station is added to the CbmL1 interface:

CbmL1::DisableTrackingStation(detId, iSt);

where l1 - detId - entry of the L1DetectorID enumeration, defined in CbmL1DetectorID.h, iSt - index of tracking station

Example: disabling the second and the fourth stations of STS:

// L1 tracking
auto l1 = (debugWithMC) ? new CbmL1("CA", 2, 3, 4) : new CbmL1("CA", 0, 0, 4);
l1->DisableTrackingStation(L1DetectorID::kSts, 1);
l1->DisableTrackingStation(L1DetectorID::kSts, 3);