Introduced LArAlignCondAlg nad LArAlignHelper. The latter contains the code for
applying alignment corrections to LArGeoModel. It is used by both LArAlignCondAlg
and LArDetectorTool.

Added CONDCONT_DEF for two classes
* DetCondKeyTrans
* CaloCellPositionShift

Fixed LArConditionsCommon/python/LArAlignable.py so that it declares "/LAR/Align" and
"/LAR/LArCellPositionShift" folders to the CondInputLoader, and removed the obsolete
LArConditionsCommon/share/LArAlignable.py

Switched CaloMgrDetDescrCnv from `fabs` to `std::abs`