DOC: update order of tags in Apps (first tag is taken as section in CookBook)

...cations/AppClassification/app/otbKMeansClassification.cxx

...plications/AppClassification/app/otbSOMClassification.cxx

...imensionalityReduction/app/otbDimensionalityReduction.cxx

Modules/Applications/AppEdge/app/otbEdgeExtraction.cxx

Modules/Applications/AppFiltering/app/otbDespeckle.cxx

...cations/AppHyperspectral/app/otbHyperspectralUnmixing.cxx

...tions/AppHyperspectral/app/otbVertexComponentAnalysis.cxx

Modules/Applications/AppImageUtils/app/otbColorMapping.cxx

Modules/Applications/AppImageUtils/app/otbCompareImages.cxx

Modules/Applications/AppImageUtils/app/otbConvert.cxx

...s/Applications/AppImageUtils/app/otbDownloadSRTMTiles.cxx

Modules/Applications/AppImageUtils/app/otbManageNoData.cxx

...lications/AppImageUtils/app/otbMultiResolutionPyramid.cxx

Modules/Applications/AppImageUtils/app/otbPixelValue.cxx

Modules/Applications/AppImageUtils/app/otbReadImageInfo.cxx

...les/Applications/AppIndices/app/otbRadiometricIndices.cxx

Modules/Applications/AppKMZ/app/otbKmzExport.cxx

Modules/Applications/AppMathParser/app/otbBandMath.cxx

Modules/Applications/AppMathParserX/app/otbBandMathX.cxx

...plications/AppMoments/app/otbLocalStatisticExtraction.cxx