[Openstack-stable-maint] Stable check of openstack/oslo.serialization for ref refs/heads/stable/wallaby failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/35980c1f0e2042eb99d241b184ad7f... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/93288b9f64ba485f8034a5b80a56acc2 : TIMED_OUT in 31m 01s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/11339b29910f49fe9ec33debbacd1920 : SUCCESS in 2m 59s - openstack-tox-py38 https://zuul.opendev.org/t/openstack/build/acee9777742c4ec5af82db5359323809 : TIMED_OUT in 40m 49s