Build failed. https://zuul.opendev.org/t/openstack/buildset/ba6bf3f6c80842039a72962e8c7f5d33 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/9ec5bda798ee48989ae38f73a7b6d30e : SUCCESS in 3m 29s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a6f7fcef1c694a2a9a19e8243ebdc875 : SUCCESS in 3m 30s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/9a24a29a23f64df09a2caa4f80a1c697 : SUCCESS in 3m 20s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5b897c53a6124a209912d87ff61ef653 : FAILURE in 3m 57s