Add a policy to enforce authentication with a user in the service group. This maintains AWS compatibility with the added security layer. Closes-Bug: 2119646 Change-Id: Ic84b84247e05f29874e2c5636a033aaedd4de83c Signed-off-by: Grzegorz Grasza <xek@redhat.com> Signed-off-by: Jeremy Stanley <fungi@yuggoth.org> Signed-off-by: Artem Goncharov <artem.goncharov@gmail.com>