COMP: remove workaround for CMake < 2.4 and follow OTB install tree for ITK

Utilities/ITK/CMakeLists.txt

Utilities/ITK/Code/Algorithms/CMakeLists.txt

Utilities/ITK/Code/BasicFilters/CMakeLists.txt

Utilities/ITK/Code/Common/CMakeLists.txt

Utilities/ITK/Code/IO/CMakeLists.txt

Utilities/ITK/Code/Numerics/CMakeLists.txt

Utilities/ITK/Code/Numerics/FEM/CMakeLists.txt

Utilities/ITK/Code/Numerics/NeuralNetworks/CMakeLists.txt

Utilities/ITK/Code/Numerics/Statistics/CMakeLists.txt

Utilities/ITK/Code/Patented/CMakeLists.txt

Utilities/ITK/Code/Review/CMakeLists.txt

Utilities/ITK/Code/Review/Statistics/CMakeLists.txt

Utilities/ITK/Code/SpatialObject/CMakeLists.txt

Utilities/ITK/Utilities/CMakeLists.txt

Utilities/ITK/Utilities/DICOMParser/CMakeLists.txt

Utilities/ITK/Utilities/MetaIO/CMakeLists.txt

Utilities/ITK/Utilities/NrrdIO/CMakeLists.txt

Utilities/ITK/Utilities/expat/CMakeLists.txt

Utilities/ITK/Utilities/gdcm/CMakeLists.txt

Utilities/ITK/Utilities/gdcm/Dicts/CMakeLists.txt