ENH: use the right key for the elevation in the Kmz export test

Testing/Applications/Utils/CMakeLists.txt

@@ -146,7 +146,8 @@ OTB_TEST_APPLICATION(NAME apTvUtKmzExport
                              -out ${TEMP}/apTvUtKmzExport.kmz
                              -logo ${INPUTDATA}/cnes.png
                              -legend ${INPUTDATA}/otb_big.png
-                             -dem ${INPUTDATA}/DEM/srtm_directory)
+                             -elev dem
+                             -elev.dem.path ${INPUTDATA}/DEM/srtm_directory)
 
 
 IF(OTB_DATA_USE_LARGEINPUT)