We've seen races where the socket may be gone but the server is still writing
out it's database. Handle that case too to avoid cleanup tracebacks.
[YOCTO #14440]
(Bitbake rev: b9e4fb843cb9d3a4d4404af093a781fab5520465)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>