Build failed. https://zuul.opendev.org/t/openstack/buildset/9f0656c7f04e4e04b4d7ab6e3099f2b6 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/d88d219169e64ffea2dbc18615555e32 : SUCCESS in 3m 21s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/912dbf35cc8c4b70a51f635e1efa98cf : SUCCESS in 4m 35s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/0a2fee97a66d4698a1145442c6593b0e : FAILURE in 3m 57s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/f9166ed2815843d8a0caf0cd47034ae2 : FAILURE in 2m 59s