Merge branch 'develop' of gitlab.orfeo-toolbox.org:orfeotoolbox/otb into develop

...Applications/Files/apTvClTrainImagesRegressionModel.1.txt

...B-Applications/Files/apTvClTrainImagesRegressionModel.txt

...-Applications/Files/apTvClTrainImagesRegressionNoVD.1.txt

...TB-Applications/Files/apTvClTrainImagesRegressionNoVD.txt

Modules/Applications/AppClassification/app/CMakeLists.txt

...ations/AppClassification/app/otbTrainImagesRegression.cxx

...Applications/AppClassification/app/otbTrainRegression.cxx

...ations/AppClassification/app/otbTrainVectorRegression.cxx

Modules/Applications/AppClassification/test/CMakeLists.txt