Build failed. https://zuul.opendev.org/t/openstack/buildset/c3eb688189f14d87a716cb56a4d19c2b - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8635c94cb6cd4c5d9f14c0efc0df1780 : SUCCESS in 4m 47s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/112130a9d724466c9110a1deee6dfc02 : SUCCESS in 3m 06s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/a5c4e34aee4046be93e69cb6510e5539 : FAILURE in 3m 57s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/fec3e9e6924243cc8e0eb0ba940867b8 : FAILURE in 2m 24s