Merge branch 'improve_SARMulti' into 'master'

app/otbSARAltAmbig.cxx

app/otbSARCorrectionGrid.cxx

app/otbSARESD.cxx

app/otbSARMetadataCorrection.cxx

include/otbSARDEMProjectionImageFilter.txx

include/otbSARGroupedByOrthoImageFilter.txx

include/otbSARStreamingMaximumMinimumImageFilter.h

include/otbSARTemporalCorrelationGridImageFilter.txx

include/otbSARUpdateMetadataImageFilter.txx

include/otbTilesAnalysisImageFilter.txx

python_src/SAR_MultiSlc.py

python_src/SAR_MultiSlc_IW.py

python_src/diapOTB.py

python_src/diapOTB_S1IW.py

python_src/ex_config/ex_config_MultiSlc_CosmoS1SM.json

python_src/ex_config/ex_config_MultiSlc_IW.json

python_src/ex_config/ex_config_diapOTB_Cosmo.json

python_src/ex_config/ex_config_diapOTB_S1IW.json

python_src/ex_config/ex_config_diapOTB_S1SM.json

python_src/utils/func_utils.py