tests/vm/openbsd: Update to release 7.1

Signed-off-by: Brad Smith <brad@comstyle.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Message-Id: <YnRed7sw45lTbRjb@humpty.home.comstyle.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>