Build failed. https://zuul.opendev.org/t/openstack/buildset/bdfe6126a16f43fba91ff7c496598ee3 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/693c12d09459447f8062b20d0655bd44 : SUCCESS in 4m 09s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/4a637edc79914194baf04537d7953278 : SUCCESS in 4m 39s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/cd0acf8d8cca422196841cb256cf591a : SUCCESS in 4m 58s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/d1f539bc36464bd39b652443ec36258c : FAILURE in 4m 52s