Add simple license headers, not completely at top. (#5080) (#5082)

(cherry picked from commit 68e7e52557)

Co-authored-by: Felix Fontein <felix@fontein.de>

tests/integration/targets/setup_java_keytool/tasks/main.yml

@@ -3,6 +3,11 @@
 # WARNING: These are designed specifically for Ansible tests       #
 # and should not be used as examples of how to write Ansible roles #
 ####################################################################
+
+# Copyright (c) Ansible Project
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 - set_fact:
     has_java_keytool: >-
       {{