Build failed. https://zuul.opendev.org/t/openstack/buildset/f516df8ce4b84df3bfed0bf6f8592ed8 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/743adeb6e6bd4b1f98029c788b0810f7 : SUCCESS in 4m 09s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f40b987336214511b3c3a18973cbb304 : SUCCESS in 4m 30s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/26e1a7ff39214d539d5c14990b9a12fb : SUCCESS in 3m 49s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6e5c077904344d4fa8d23adb06f90e23 : FAILURE in 3m 39s