Build failed. https://zuul.opendev.org/t/openstack/buildset/6944ca2b14b74c9391f5c5923ede82ce - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/b7da349c207640bdb6f8a47833c1f431 : SUCCESS in 4m 10s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ca6ee37ca8b84ae6ba1bb8c400f1869a : SUCCESS in 5m 31s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/c8000de5a39641df9e2e08ac64f0ca80 : FAILURE in 4m 28s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/997e28320c474344a1c1619da402057a : FAILURE in 4m 28s