Build failed. https://zuul.opendev.org/t/openstack/buildset/954cb1ddb25449bb91cf4481d9f38cba - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/42096130a4be4b749a83fc08785d2031 : SUCCESS in 4m 35s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/8b5953a35b9841bcbb81898abc3ac91d : SUCCESS in 7m 01s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/78635d21f94c446597bbdef06f795168 : SUCCESS in 5m 42s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/ca0b73e6fe2d4b9bb24bde5999d444e3 : FAILURE in 6m 40s