Revert "BUG: use the new DEMHandler API in Ice"
Revert "BUG: use the new DEMHandler API in Ice"

This reverts commit ba914d9c02a0149e5d8d7fec3b9995f4145a2297.

orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB