Build failed. https://zuul.opendev.org/t/openstack/buildset/951f8d0600f3492aa9fb7ce7806e6fbd - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/7715c77074fa4aa986e6adfc0c3dfed3 : SUCCESS in 3m 35s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/6bf75b8c1e2443f3be7203694bc41371 : SUCCESS in 5m 35s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/ec85c560205e48a6ac79688c07edf955 : SUCCESS in 5m 33s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/40690dc84a1a44ff8233c092499ade78 : FAILURE in 4m 35s