Build failed. https://zuul.opendev.org/t/openstack/buildset/880cd3e201de4d23ab4140a3cd1fcaac - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/1009720411c34b83ab45864d5c65c460 : SUCCESS in 4m 11s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/00607832a3dc4d06bb1cf1fbfc8204b2 : FAILURE in 3m 16s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/a3c93a778f4e4cdda07e4919eb0f3573 : SUCCESS in 3m 31s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/30d93c7836c547d18262e99e66c48756 : SUCCESS in 4m 00s