Project: datamanagement
Issue DM-4555: Add initial butler support for remote GET
For Get: If the mapper returns a URL: retrieve the URL contents into a file return the path to the file. This will be optimized in subsequent stories by "add read support for various transports to the afw object readers". This is a degenerate case that will be used if the object does not have a reader for a given transport protocol. Need to solve the cleanup problem of when to delete the file that was downloaded. For Put: serialize the object to a temporary file transfer the file to the URL
Story points: 10