Build failed. https://zuul.opendev.org/t/openstack/buildset/67972a9e2fc34908a00028a9949c7f1c - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/2474559c4bd54be39e05c6eff28a701e : SUCCESS in 4m 29s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d3a11e6f35a44935b9738698270e04bc : SUCCESS in 6m 16s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/14d209492d0748dea48905c51c397b33 : SUCCESS in 4m 51s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/e05f9ad7633246bda74f047dde534df6 : FAILURE in 4m 36s