Comment 5 for bug 1355942

Jason: I don't think the tempest tests run with more than one engine is the default in our config atm, I'm not 100% sure if anything modifies the num_engine_workers for gate tests, but I don't think so (stevebaker may know more)

I've seen another instance of this failure here:

https://review.openstack.org/#/c/106824/12
http://logs.openstack.org/24/106824/12/check/check-tempest-dsvm-postgres-full/1e6e98a/console.html