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

Build failed. https://zuul.opendev.org/t/openstack/buildset/c4b8352dad0740dda36862e1058687... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/2b8c3e4241d64844ba91db9a8bd51c5d : SUCCESS in 3m 21s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/16267c6ec6fa43fd907753048265776d : SUCCESS in 3m 36s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/0a89280032284ad98c5ef4ef2e6394b3 : SUCCESS in 3m 35s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5d6c3e6606c34b9a97b9635c0d8efd99 : POST_FAILURE in 3m 29s