Add javadoc for Kudu Flume sink

Change-Id: I5cf5d540f1883528f46806089f0abf5d8ad20faa
Reviewed-on: http://gerrit.cloudera.org:8080/2713
Tested-by: Kudu Jenkins
Reviewed-by: Jean-Daniel Cryans
(cherry picked from commit a6dfbf6de09889d56c39e2c23357799778df9bbb)
Reviewed-on: http://gerrit.cloudera.org:8080/2716
2 files changed