Build failed. https://zuul.opendev.org/t/openstack/buildset/2c4a876f90a840a9b5ba6ed7fdc038d3 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/b0a1ee9d89844e758da6e1bfb39a5343 : SUCCESS in 4m 15s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/2c7d293fa00a46469dfab2afcd40a21d : SUCCESS in 5m 23s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4f609cf711794a5a86a0e572ff255883 : SUCCESS in 5m 45s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/451ba9aadff942549d7f6a401db5817d : FAILURE in 5m 02s