Build failed. https://zuul.opendev.org/t/openstack/buildset/b4c4c72e07b3406fafaad519a9d70166 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/c51fc2789e9f4769b72e4803a75291a6 : SUCCESS in 3m 15s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/fbf6496aab2e4d69bdc8a58bc69c72dc : SUCCESS in 2m 44s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/868813c8875a4cbaaf4ca05cd910cb3d : SUCCESS in 2m 56s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/8dbe41f145984a98b3764624e162fdb0 : FAILURE in 3m 32s