There is no guarantee UDP messages will be received. Accommodate the
occasional dropped message.
This is a functionality test, not a performance benchmark. Speed up the
test by not sending 1500 messages across three ports.
Fixes: https://github.com/nodejs/node/issues/4526
PR-URL: https://github.com/nodejs/node/pull/5125
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>