Test data identified and available to enable testing of the DM prototype

Identify radio data sets that are publicly available that have rich IVOA metadata, communicate with the "owners" regarding using the data for this purpose. CAOM xml or json files can be exported for science metadata.

AC: List of downloadable URLs of the relevant data sets. 

AC: Test data added to DM prototype 1a 

AC: Test data added to DM prototype 1b, a new storage site deployed by a team in the SRC ART