Build failed. https://zuul.opendev.org/t/openstack/buildset/c726cc366d6c412e97291b06f49c04a2 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8fb070ad42624cb7ac9da805afbe124f : SUCCESS in 4m 09s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/e051da79315b40c4a2a88f8cd55424a6 : SUCCESS in 4m 29s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/5e900b9770f04948bb55ca6ce546dd1b : SUCCESS in 4m 36s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0cc511bc7f1143fd8fcfba4ebb9e7240 : FAILURE in 6m 05s