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

Build failed. https://zuul.opendev.org/t/openstack/buildset/18e73861f3aa494e9d3549efc9f67f... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/0f524bf06e194ffdb2caf45b1fac278f : SUCCESS in 3m 07s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/e6a7f2ae805241febcf57b378857322a : FAILURE in 4m 14s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/83ac334edc43417193eb74b07b673999 : SUCCESS in 3m 40s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b1acfe848db14092bb022484fc35e973 : SUCCESS in 3m 31s