WRG: fix gazillion wrg from shark, fix assignments in if condition and other warnings

...onalityReduction/app/otbVectorDimensionalityReduction.cxx

...on/include/otbDimensionalityReductionTrainAutoencoder.txx

...yReduction/include/otbDimensionalityReductionTrainSOM.txx

...nsionalityReductionLearning/include/otbAutoencoderModel.h

...ionalityReductionLearning/include/otbAutoencoderModel.txx

...ityReductionLearning/include/otbAutoencoderModelFactory.h

...yReductionLearning/include/otbAutoencoderModelFactory.txx

...earning/include/otbImageDimensionalityReductionFilter.txx

...ing/DimensionalityReductionLearning/include/otbPCAModel.h

...g/DimensionalityReductionLearning/include/otbPCAModel.txx

...g/DimensionalityReductionLearning/include/otbSOMModel.txx