Don't wait gossipTimeoutToSweep on Cluster shutdown #245
Description
Subj.
Use gossipDisseminationTime to figure out when it's safe to stop waiting on gossip SHUTDOWN. Motivation -- gossipTimeoutToSweep is 2x times longer than gossipDisseminationTime. No reason to wait until SHUTDOWN gossip will be removed, it's ok to wait at least dissemination time.