Add KeyValue to the Bandwidth file with the name of the dirauth that is running the scanner

This is similar to onbasca#53. For team#313 and other past and current issues, it'd be great to be able to filter by dirauth. Currently, this can be done by looking at the software_version, scanner_country and destinations_countries KeyValues, but it's quite complicates as they change overtime and this is only registered at Bandwidth authorities timeline wiki