[Openstack-stable-maint] Stable check of openstack/neutron-vpnaas for ref refs/heads/stable/yoga failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/d9b90bb433e243bb9da07298715a16... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/e6bfd275de0143c1b0319b0c82f31f55 : SUCCESS in 8m 08s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/f69fa0ff081c4e11b7b93dd894ff5726 : SUCCESS in 6m 50s - openstack-tox-py38 https://zuul.opendev.org/t/openstack/build/8b5cf75fd07644fab4a4f22b3b39450a : POST_FAILURE in 6m 09s