Build failed. https://zuul.opendev.org/t/openstack/buildset/0c9d84d334e748338173c1a7d2b1aea5 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/3ca7e9aba8bc4892a33f0e3bc8077cf9 : SUCCESS in 4m 03s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/e1d3bb866aa546cdbb2f284433558a2d : SUCCESS in 2m 38s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/2f435a4483224c99892735ab3676fb1e : SUCCESS in 2m 45s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0b9d66d503b44f80903dbe89a5a8ad03 : FAILURE in 2m 31s