Build failed. https://zuul.opendev.org/t/openstack/buildset/6926c69201f542e89572b62bbaf2481d - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/306649dba0b54cf6b5320e58c7c99659 : SUCCESS in 5m 12s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a66531d1d6254c018a25905299878e08 : FAILURE in 2m 49s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/2056864640b24273b6218f78067b9b13 : SUCCESS in 3m 40s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6dffa3dcb1c640ec8f6dc9c184a49e39 : SUCCESS in 3m 57s