Make sure validator tests run on both draft 3 and 4 validators
Make sure validator tests run on both draft 3 and 4 validators

python-jsonschema/jsonschema,jamesmarva/jsonschema,Julian/jsonschema,eodolphi/jsonschema,sightmachine/jsonschema,mathewmarcus/jsonschema,varunarya10/jsonschema,wikimedia/operations-debs-python-jsonschema,eodolphi/jsonschema,wikimedia/operations-debs-python-jsonschema,Julian/jsonschema,dnephin/jsonschema