Build failed. https://zuul.opendev.org/t/openstack/buildset/0e80f76cc5da4195a7f0f8d7ce842dc6 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/3f24716d1b1c40a787a22dbb0879265f : SUCCESS in 4m 39s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ad5e046f9985405ca4ee98e10da3e72f : SUCCESS in 4m 48s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4b418ff7e8854d969ecb302af7173c57 : SUCCESS in 4m 46s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/3850db2492054fab8c39c01a5ddee1f4 : FAILURE in 3m 55s