tempest failing across RDO sf stein jobs

[wes hayutin]

https://logserver.rdoproject.org/openstack-periodic-24hr/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-7-standalone-stein/2b88378/logs/tempest.html.gz

https://logserver.rdoproject.org/openstack-periodic-24hr/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-7-scenario001-standalone-stein/620170c/logs/tempest.html.gz

https://logserver.rdoproject.org/openstack-periodic-24hr/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-7-scenario002-standalone-stein/2e9265a/logs/tempest.html.gz

https://logserver.rdoproject.org/openstack-periodic-24hr/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-7-scenario003-standalone-stein/f388b2b/logs/tempest.html.gz

https://logserver.rdoproject.org/openstack-periodic-24hr/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-7-scenario004-standalone-stein/6eea9c7/logs/tempest.html.gz

We think this is either related to the centos-7 cloud image in rdosf or periodic job config.
Investigating..

We think this because the upstream periodic jobs are working just fine :)
http://dashboard-ci.tripleo.org/d/3sUHfh9Wz/jobs-exploration?orgId=1&from=now-7d&to=now&var-influxdb_filter=job_name%7C%3D%7Ctripleo-ci-centos-7-containers-multinode-stein&var-influxdb_filter=pipeline%7C%3D%7Cperiodic