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

Build failed. https://zuul.opendev.org/t/openstack/buildset/b7073904fbda4ff683b1a75e1425ae... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/f25f1c33b9e14092ba9d3a74de76413c : FAILURE in 2m 31s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a6e3734330764acf9b8d1a12a441d5bd : FAILURE in 3m 43s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/3e4f38f5f5784b9881c1acf857c71194 : FAILURE in 3m 31s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/96737ca13dd743bba9bcd9e0f9e0c42e : FAILURE in 4m 00s