OVB featureset001 job on master fails right after introspection

[Gabriele Cerami]

logs at

https://logs.rdoproject.org/openstack-periodic/git.openstack.org/openstack-infra/tripleo-ci/master/legacy-periodic-tripleo-ci-centos-7-ovb-3ctlr_1comp-featureset001-master/3e961ea/logs/undercloud/home/zuul/overcloud_prep_images.log.txt.gz#_2018-08-08_19_07_06

show that right after introspection, the process is " Waiting for messages on queue 'tripleo' with no timeout."

After more than 1 hour the process stops with

2018-08-08 19:07:06 | Connection is already closed.
2018-08-08 19:07:06 | [{}, {}, {}, {u'result': u'Node 28ff84cb-a833-48da-93ab-8ac7aea5e140 did not reach state "available", the state is "clean wait", error: None'}]