ENH: Use existing enum and add a template parameter to define band enum

Examples/OBIA/RadiometricAttributesLabelMapFilterExample.cxx

...ARVIMultiChannelRAndBAndNIRVegetationIndexImageFilter.cxx

.../AVIMultiChannelRAndGAndNIRVegetationIndexImageFilter.cxx

Examples/Simulation/LAIFromNDVIImageTransform.cxx

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

...tion/UrbanArea/include/otbUrbanAreaDetectionImageFilter.h

Modules/Radiometry/Indices/include/otbBandName.h

...les/Radiometry/Indices/include/otbBuiltUpIndicesFunctor.h

...diometry/Indices/include/otbNDVIDataNodeFeatureFunction.h

Modules/Radiometry/Indices/include/otbRadiometricIndice.h

Modules/Radiometry/Indices/include/otbSoilIndicesFunctor.h

.../Radiometry/Indices/include/otbVegetationIndicesFunctor.h

Modules/Radiometry/Indices/include/otbWaterIndicesFunctor.h

...try/Indices/test/otbLAIFromNDVILogarithmicFunctorTest.cxx

.../Indices/test/otbLAIFromReflectancesLinearFunctorTest.cxx

...on/include/otbReduceSpectralResponseClassifierRAndNIR.hxx