Build failed. https://zuul.opendev.org/t/openstack/buildset/c771db4ff9e34e448cf30c6d08d7449a - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/bea435e527df4acab0f2412cb1856c49 : FAILURE in 3m 10s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c99797feca174890b1adc814110fa4c3 : FAILURE in 3m 28s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/f9f7efacc4464dfcac6521d2bc361816 : SUCCESS in 2m 48s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/446972f7b39d45b09e3feb37f4ccf500 : SUCCESS in 3m 19s