Comment 7 for bug 1488282

Another tests removes it: http://logs.openstack.org/04/215604/15/gate/gate-tempest-dsvm-neutron-full/37eb7aa/logs/screen-n-api.txt.gz#_2015-08-26_15_32_55_908

Therefore there are two issues here in my opinion:

1) Nova should never error with a 404 in this case during instance list
2) The tempest test is poorly designed as it assumes that during test execution instances created by other tests will not be deleted.

The latter issue is common design problem to several compute tests - as there is a similar situation in a different bug: https://bugs.launchpad.net/tempest/+bug/1468523