Fixup iwyu and Java header license issues

Change-Id: I6b1dd4ab4ad0c785e8f5b3652301fed5deb3a962
Reviewed-on: http://gerrit.cloudera.org:8080/7941
Reviewed-by: Mike Percy <mpercy@apache.org>
Tested-by: Kudu Jenkins
(cherry picked from commit 311755895e48a5d52b9f398c8b89847aa808fa19)
Reviewed-on: http://gerrit.cloudera.org:8080/7946
Reviewed-by: Dan Burkert <danburkert@apache.org>
Tested-by: Dan Burkert <danburkert@apache.org>
17 files changed