Build failed. https://zuul.opendev.org/t/openstack/buildset/be522bf45ce943f19e50c6a411205206 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6e11244d51c84b90a74a5080f54e67e4 : SUCCESS in 4m 01s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d166bfdf29fd4283a3f8cfb3a8f34f72 : SUCCESS in 4m 46s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/e9e3912840a44044996f7304888d23af : SUCCESS in 4m 21s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/a25bd40a87d8442cb5842bdd73836893 : FAILURE in 5m 07s