Upstream have released 2015.1.4: http://tarballs.openstack.org/heat/heat-2015.1.4.tar.gz This is the last release on the stable/kilo branch before it was declared EOL upstream.
rpm is in the puddle openstack-heat-api-2015.1.4-1.el7ost.noarch automation passed https://rhos-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/job/rhos-jenkins-l3ha-rhos-7.0-puddle-rhel-7.2-3networkers-packstack-neutron-ml2-vxlan-rabbitmq-tempest-rpm-all/9/
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-2016:1281