ENH: Rename EuclideanDistance as EuclideanDistanceMetric

Code/BasicFilters/otbBoxAndWhiskerImageFilter.h

Code/BasicFilters/otbBoxAndWhiskerImageFilter.txx

Code/BasicFilters/otbDBOverlapDataNodeFeatureFunction.h

Code/BasicFilters/otbDBOverlapDataNodeFeatureFunction.txx

...BasicFilters/otbEuclideanDistanceMetricWithMissingValue.h

...cFilters/otbEuclideanDistanceMetricWithMissingValuePow2.h

...ilters/otbEuclideanDistanceMetricWithMissingValuePow2.txx

Code/BasicFilters/otbFlexibleDistanceWithMissingValue.h

Code/BasicFilters/otbFlexibleDistanceWithMissingValue.txx

Code/Common/otbDataNode.h

Code/Common/otbDataNode.txx

Code/Common/otbRectangle.h

Code/Common/otbRectangle.txx

...restPointsLinearInterpolateDisplacementFieldGenerator.txx

...TransformsLinearInterpolateDisplacementFieldGenerator.txx

Code/DisparityMap/otbPointSetToDisplacementFieldGenerator.h

.../DisparityMap/otbPointSetToDisplacementFieldGenerator.txx

Code/Learning/otbSOMWithMissingValue.h

Code/Learning/otbSOMbasedImageFilter.h

Code/ObjectDetection/otbLabeledSampleLocalizationGenerator.h