Removed duplication of channelIDs between LHCb and Detector. Kept Detector ones

Files dropped at this stage :
    Kernel/LHCbKernel/include/Kernel/CaloCellID.h
    Kernel/LHCbKernel/include/Kernel/FTChannelID.h
    Kernel/LHCbKernel/include/Kernel/MuonTileID.h
    Kernel/LHCbKernel/include/Kernel/UTChannelID.h
    Kernel/LHCbKernel/include/Kernel/VPChannelID.h
    Kernel/LHCbKernel/src/VPChannelID.cpp

The rest of the code has been adapted to use native namespace from the Detector package