added bug #1210483 detection

there is a long standing low level neutron race around address
allocation which has been seen 42 times in the last 7 days. Just
hit it again this morning. The bug had previously been targetted
at Nova, but really wasn't a Nova bug, as it only shows up with
neutron back ends.

Change-Id: I5f721fc244baee9bce9842643a21faa6296600ec