Build failed. https://zuul.opendev.org/t/openstack/buildset/881349ced5e542888bf337ee759d982e - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/fcb2043bfd2047e6b5cf04129f491791 : SUCCESS in 3m 28s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/42f1868db162461f8d96987a10347d89 : FAILURE in 3m 02s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/22e0c179bdd540669af03bf26bfa64b5 : SUCCESS in 3m 47s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/9c5bec175bc44561b4e4e2c04faf6480 : SUCCESS in 4m 16s