Merge branch 'update_superbuild_6.2' into develop

Modules/Adapters/GdalAdapters/include/otbOGRVersionProxy.h

Modules/Adapters/GdalAdapters/src/CMakeLists.txt

Modules/Adapters/GdalAdapters/src/otbOGRFieldWrapper.cxx

Modules/Adapters/GdalAdapters/src/otbOGRVersionProxy.cxx

Modules/Adapters/GdalAdapters/src/otbOGRVersionProxy1x.cxx

...plications/AppClassification/app/otbSOMClassification.cxx

...ications/AppClassification/include/otbTrainVectorBase.txx

Modules/Applications/AppSARPolarSynth/test/CMakeLists.txt

Modules/Core/SpatialObjects/include/otbLineSpatialObject.h

Modules/Filtering/Polarimetry/test/CMakeLists.txt

...ectral/EndmembersExtraction/include/otbVcaImageFilter.txx

Modules/IO/IOGDAL/src/otbGDALImageIO.cxx

Modules/IO/IOGDAL/src/otbOGRIOHelper.cxx

Modules/IO/TestKernel/src/otbTestHelper.cxx

SuperBuild/CMake/External_boost.cmake

SuperBuild/CMake/External_curl.cmake

SuperBuild/CMake/External_expat.cmake

SuperBuild/CMake/External_fftw.cmake

SuperBuild/CMake/External_freetype.cmake

SuperBuild/CMake/External_gdal.cmake