Build failed. https://zuul.opendev.org/t/openstack/buildset/ea3bceef199f4c9aa8c18085d1259980 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/10bceb915c2d4da4917e85fe4a0b9653 : SUCCESS in 4m 49s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b920ad177eb54537851b116abf95bff8 : SUCCESS in 5m 20s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/0db8c11745674dc09deed467397f558e : SUCCESS in 4m 19s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/aab1f68a301d420198f8d84c5eba089b : FAILURE in 5m 43s