Build failed. https://zuul.opendev.org/t/openstack/buildset/15404bc3ef1f4b7bbaeaaba0767563c3 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/7e030061cd154b01a852f0f85e983f4a : SUCCESS in 4m 13s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/afcd1b9ab82d401c84cf82447bc5a8fe : SUCCESS in 4m 21s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/dc9d32be2d1e47f8987975a02226c2b5 : SUCCESS in 4m 49s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5a374e717bc048328f030322ab349670 : FAILURE in 6m 35s