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

Build failed. https://zuul.opendev.org/t/openstack/buildset/cf16e6d55eda4142ac4b05f1ab4117... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ba2ea1c024004e3f9b53cac382bb848b : SUCCESS in 5m 13s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d7c1c36f4a54447ab03c97467827c469 : SUCCESS in 11m 38s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d536d139c66f459385ca3887d594084f : SUCCESS in 11m 37s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2df6e9c209fa4193b7b526502540f7fd : FAILURE in 13m 37s