REFAC: moving SimplifyPath in the ObjectList filter hierarchy

Code/BasicFilters/otbSimplifyPathFunctor.h

Code/FeatureExtraction/otbGenericRoadExtractionFilter.h

Code/FeatureExtraction/otbGenericRoadExtractionFilter.txx

Code/FeatureExtraction/otbRemoveTortuousPathListFilter.h

Code/FeatureExtraction/otbSimplifyPathListFilter.h

...lReasoning/otbImageMultiSegmentationToRCC8GraphFilter.txx

Examples/FeatureExtraction/ExtractRoadByStepsExample.cxx

Testing/Code/FeatureExtraction/otbSimplifyPathListFilter.cxx

...de/SpatialReasoning/otbPolygonToPolygonRCC8Calculator.cxx