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

Build failed. https://zuul.opendev.org/t/openstack/buildset/72760ee58cee48619925a95094d81f... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/b2cd30d586bc4a96aba088ee0bb48eb2 : SUCCESS in 5m 56s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/5e9dd4c62daf47db82aec50602e1d035 : SUCCESS in 11m 34s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/bdd298dca123437e8f9d6da5aec0ac7b : SUCCESS in 10m 33s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c267ea23ba99402f84ef3dc6f1dc1965 : FAILURE in 10m 54s