HBASE-19039 refactor shadedjars test to only run on java changes.
HBASE-19039 refactor shadedjars test to only run on java changes.

Signed-off-by: Mike Drob <7d5db5eeae20c13a709f5640b51f5c63dc0a2d15@apache.org>

HubSpot/hbase,HubSpot/hbase,HubSpot/hbase,HubSpot/hbase,HubSpot/hbase,HubSpot/hbase,HubSpot/hbase,HubSpot/hbase,HubSpot/hbase,HubSpot/hbase