ran tempest on latest Z stream:
{0} heat_integrationtests.functional.test_create_update.UpdateStackTest.test_stack_update_with_new_version [19.477346s] ... ok
{0} heat_integrationtests.functional.test_create_update.UpdateStackTest.test_stack_update_with_old_version [15.206239s] ... ok
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2017:2655