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

Build failed. https://zuul.opendev.org/t/openstack/buildset/99ed8293c34f417a90b72b7ab03439... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/c22d0ed60a6c4f08a400b0f73c7943f1 : SUCCESS in 7m 52s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d98096c034b641c88b626dc36dd9ab19 : SUCCESS in 14m 50s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/1b07b42123fb47bd9ea261e628069863 : FAILURE in 11m 01s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/bf9976a66a504f229f2f5499d4cb4283 : SUCCESS in 10m 55s