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

Build failed. https://zuul.opendev.org/t/openstack/buildset/f499e76358fc4159b9b08a1e994337... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/48615315c108470487b0567a1faca182 : SUCCESS in 4m 35s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/fc2204e7b5784131bc463967a4233ae8 : SUCCESS in 14m 11s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b88ceb78b87d4412acbb89f8303bc24c : SUCCESS in 10m 29s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7259da663e834d5da420394311f1cd14 : FAILURE in 10m 36s