Add possibility to disable dump if needed
In some cases, when performing a dump, some extra informations are dumped but are not relevant.
For instance, when updating a tile for a SRTM tile, we need to add the geoid value of the current point. In the dump file, the geoid tile is also dumped and it leds to bad results when performing the DumpReplayer, as the geoid elevations are read instead of the real elevations.
