[Openstack-stable-maint] Stable check of openstack/heat for ref refs/heads/stable/train failed

Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/5109f218d79e48808169430c7751ae83 : SUCCESS in 9m 46s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/52675c5ca3b24f689038bdfc6c7d945c : FAILURE in 4m 18s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/38e68c2552e648f4ba0cf0bcef6203ae : SUCCESS in 9m 50s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0aa7bc8b176c4c538cd731e247e8e561 : SUCCESS in 9m 20s