cleanup script for dataset format

[longshuicy]

Currently we have some mismatch of the format. Here is a summary:

{'table': 904,
 'shapefile': 2536,
 'textFiles': 1,
 'shp-network': 57,
 'raster': 2792,
 'csv': 19,
 'Unknown': 1,
 'geotif': 747,
 'json': 14,
 'inp': 1,
 'Table': 1,
 'geotiff': 1}

Proposing to clean it up by
"csv" --> "table",
"geotif" --> "raster"
"geotiff" --> "raster"
"textFiles" --> "textfile"
"inp" --> "unknown"

Caution: Uncomment the last line to deposit real change into database

[Rashmil-1999]

looks good