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

* prefer range-based loops
* prefer childIDetectorElements() over chilBegin(),childEnd()
* deprecate redundant chilBegin(),childEnd()

* prefer pass-by-value for small objects
* remove redundant dynamic_cast
* drop redundant const qualifiers
* prefer [[maybe_unused]] over #ifdef NDEBUG
* include the relevant header
* move DeUTSector::Status conversion to/from string to DeUTSector
* add functions needed to support Gaudi::Property<DeUTSector::Status>
* move the functions in UTDetFun to the .cpp files which use them,
  and retire UTDetFun.h

also update version to 53.0