Comment 2 for bug 1607814

I noticed this error today where the job is killed. It seems to happen while deleting a resource in an IN_PROGRESS stack for StackValidationTest[1].

[1] http://logs.openstack.org/95/351095/3/check/gate-heat-dsvm-functional-convg-mysql-lbaasv2/e103c01/logs/screen-h-eng.txt.gz#_2016-08-05_08_55_30_684