add remote_data marker to salt2source test
add remote_data marker to salt2source test

sncosmo/sncosmo,sncosmo/sncosmo,dannygoldstein/sncosmo,kbarbary/sncosmo,dannygoldstein/sncosmo,sncosmo/sncosmo,kbarbary/sncosmo,dannygoldstein/sncosmo,kbarbary/sncosmo