Merge branch 'diapotb-official-remote' into 'develop'

Integrate diapotb as official remote module

See merge request orfeotoolbox/otb!296

Modules/Remote/diapotb.remote.cmake

+#Contact: Gaëlle USSEGLIO
+otb_fetch_module(DiapOTBModule
+  "OTB module for SAR processing in Diapason."
+  GIT_REPOSITORY https://gitlab.orfeo-toolbox.org/remote_modules/diapotb.git
+  GIT_TAG master
+)