Add headers to ci tests (#954)

* CI tests: add note to main.yml

* improve

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

@@ -1,4 +1,9 @@
 ---
+####################################################################
+# WARNING: These are designed specifically for Ansible tests       #
+# and should not be used as examples of how to write Ansible roles #
+####################################################################
+
 - name: prep pkcs12 file
   copy: src="{{ test_pkcs12_path }}" dest="{{output_dir}}/{{ test_pkcs12_path }}"