ENH: enabled bakward compatibility for hu flusser and complexmoments image functions

Code/FeatureExtraction/otbComplexMomentImageFunction.h

Code/FeatureExtraction/otbComplexMomentImageFunction.txx

Code/FeatureExtraction/otbFlusserImageFunction.h

Code/FeatureExtraction/otbFlusserImageFunction.txx

Code/FeatureExtraction/otbHuImageFunction.h

Code/FeatureExtraction/otbHuImageFunction.txx

Code/FeatureExtraction/otbRealMomentImageFunction.h

Testing/Code/FeatureExtraction/CMakeLists.txt

Testing/Code/FeatureExtraction/otbComplexMomentImage.cxx

...ing/Code/FeatureExtraction/otbFeatureExtractionTests1.cxx

Testing/Code/FeatureExtraction/otbFlusserImage.cxx

Testing/Code/FeatureExtraction/otbHuImage.cxx