STYLE: correcting class misspelling

Code/FeatureExtraction/otbGenericRoadExtractionFilter.h

Code/FeatureExtraction/otbGenericRoadExtractionFilter.txx

Code/FeatureExtraction/otbLikelihoodPathListFilter.h

Code/FeatureExtraction/otbLikelihoodPathListFilter.txx

Examples/FeatureExtraction/ExtractRoadByStepsExample.cxx

Testing/Code/FeatureExtraction/CMakeLists.txt

...ing/Code/FeatureExtraction/otbFeatureExtractionTests8.cxx

...ng/Code/FeatureExtraction/otbLikelihoodPathListFilter.cxx

...Code/FeatureExtraction/otbLikelihoodPathListFilterNew.cxx