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

Build failed. https://zuul.opendev.org/t/openstack/buildset/4c0fb101cff24c34bc49590d7598d5... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/05b3028987554e3582cdb5f1236ad3c1 : SUCCESS in 3m 28s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ed28a2e0727c46c7b933919312e47c0a : SUCCESS in 3m 25s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/abed47cd25b44263a8cfbc371f2ffdd6 : RETRY_LIMIT in 2s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7f23c1beafd64eef86a17714419a214a : RETRY_LIMIT in 2s