Merged requested to merge modulus_2bands into develop
The support of complex images in otb applications as improved in version 6.6. There is generic mechanism based on teh ClampImageFilter which allow to go from/to complex or multi-bands scalar images. The only change is to read the input image as ComplexFloatImageType which support both complex image (single band) or image with 2 bands which corresponds to the real and imaginary parts. The documentation of the application has been updated to reflect this modification.
Allow to compute modulus and phase from complex single image and 2 bands as it is fully supported by otb filters
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***Check before merging:*** - All discussions are resolved - At least 2