Add --write parameter since it is now obligatory

tools/ConfigDb/update_ConfigDb.sh

@@ -7,4 +7,4 @@ elif [ ${1:0:10} != /hosthome/ -a ${1:0:11} != /opt/tango/ -a ${1:0:11} != /opt/
     exit -2
 fi
 
-docker exec -it ${TANGO_CONTAINER_ENV} dsconfig json2tango --update ${1}
+docker exec -it ${TANGO_CONTAINER_ENV} dsconfig json2tango --write --update ${1}