Build failed. https://zuul.opendev.org/t/openstack/buildset/2f05fd2ffc7a4f20ba2cfc5a0e28f429 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/7d0ac6b1357146c4ad6f89ec98cc7341 : SUCCESS in 4m 15s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/8a61e1f2b31e44639bf0c820c4f67b4f : SUCCESS in 3m 29s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d4031d003dca4400adc4f650486add8d : FAILURE in 3m 08s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6826833fd8574dfc9b36fc7cefb82667 : FAILURE in 3m 06s