Comment 38 for bug 1052535

Ok, so we fixed it by using make-ip-netns-delete-more-likely-to-succeed.patch
from https://launchpad.net/ubuntu/precise/+source/iproute/20111117-1ubuntu2.1 because my idea of killing processes will not apply very well to the veth pairs which are affected too and which are less easier to identify for a proper namespace than regular processes when relatively old userspace tools are in use. This one applies to RDO iproute2 package as well and fixes this problem completely, so I may think we can finally close this issue.