ENH : 2CONST_PI -> CONST_2PI, name confusion

Code/BasicFilters/otbAmplitudePhaseToRGBFunctor.h

Code/BasicFilters/otbGaborFilterGenerator.txx

Code/FeatureExtraction/otbBreakAngularPathListFilter.txx

Code/FeatureExtraction/otbImageToPathListAlignFilter.txx

Code/FeatureExtraction/otbImageToSIFTKeyPointSetFilter.h

Code/FeatureExtraction/otbImageToSIFTKeyPointSetFilter.txx

Code/FeatureExtraction/otbLineSegmentDetector.txx

Code/FeatureExtraction/otbLinkPathListFilter.txx

Code/FeatureExtraction/otbSFSTexturesFunctor.h

Code/FeatureExtraction/otbSFSTexturesImageFilter.h

Code/Markov/otbMRFEnergyGaussianClassification.h

Code/Visu/otbImageWidgetCircleForm.cxx