The latest YAQL (1.1.3-2.el7) introduces backward incompatible change which was not present in YAQL (1.1.0-3.el7) and below. In order to be able to upgrade to latest YAQL and not to break any new deployments or upgrades YAQL expression should be rewritten to version which is compatible in all YAQL versions.
Upstream bug: https://bugs.launchpad.net/tripleo/+bug/1750032
Upstream fix: https://review.openstack.org/#/c/545856/1
Verified with openstack-tripleo-heat-templates-8.0.0-0.20180304031146.6cd4184.el7ost.noarch
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.