Output filename of harmony.util.download does not match docstring description

[asjohnston-asf]

The docstring for harmony_service_lib.util.download() says "Downloads the given URL to the given destination directory, using the basename of the URL as the filename in the destination directory", but the implementation via harmony.util._filename() instead uses a random sha256 hash as the filename stem.

I'd prefer the former approach. I want the output file of my service to be named based on the input granule, and the pystac.Item input only includes the name of the input granule in the asset filenames.