This bug was present in the older version of libvirt present on Xenial.
In the gate we have upgraded libvirt via Ubuntu Cloud Archive and this
bug no longer shows up. I don't think we need to keep tracking it since
we've done that upgrade.
Change-Id: I89daa0aa95ae2ee73b1c55d6a4500d1b4ea7d9b3
This doesn't happen often, 2 hits in 7 days, but
it's on multiple changes including the gate queue
so we should track it.
Change-Id: I816e9aac79ae1b706f4051f093bc25ec8d3ae738
Related-Bug: #1638982