Remove rsync from load_raster

[edsu]

load_raster uses rsync to copy raster files to Geoserver. But our geoserver and gis-robot-suite environments share a mount point that is configured inSettings.geohydra.geotiff.dir. Settings.geohydra.geotiff.host can be used to remotely copy to another machine but our configurations always set this to localhost.

Since we are no longer remotely copying files load_rastercan be simplified by doing a file copy. While it's not a bug to use rsync here, it isn't being used, and upcoming changes to network security suggest that it is probably a good idea to remove the functionality.