GEOMESA-486 CSV to Shapefile REST endpoint

Implements webservice deployed through Geoserver that
* receives a CSV file
* guesses a type schema for the columns
* creates a shapefile using the guessed schema or a user-supplied one
* exposes the zipped shapefile for geoserver ingest
is there a reason that setting it to something higher (say 100 megs) would be unreasonable? I have seen 50mb shapefiles before.