[build] Fix the RAT report
[build] Fix the RAT report

The patch fixes the RAT report by excluding license checks for the
testdata files.

Change-Id: I453f6fcd6e1dd29fa7fc2485db9e7a13879d6f9b
Reviewed-on: http://gerrit.cloudera.org:8080/15038
Reviewed-by: Adar Dembo <866ca730bfc7f544e3ebce604ceeba4879f23df0@cloudera.com>
Reviewed-by: Attila Bukor <53758272babe3057a5ff4ad51afd9bfd6e6014a1@apache.org>
Tested-by: Kudu Jenkins

helifu/kudu,helifu/kudu,helifu/kudu,helifu/kudu,helifu/kudu,helifu/kudu,helifu/kudu,helifu/kudu,helifu/kudu