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 this map ever cleaned up?  Or the temp .csv files?
Maybe expose another endpoint to clean up everything associated with an ID.  Would be called for cancellation or final success.