[flume] fix import of shaded guava class

Change-Id: Id5e290446e8d67e1899d36e68d45c413fdb08cff
Reviewed-on: http://gerrit.cloudera.org:8080/3845
Reviewed-by: Adar Dembo <adar@cloudera.com>
Tested-by: Kudu Jenkins
1 file changed