This is a backport of CASSANDRA-11038. Before this, a restarted node will be reported as new node with NEW_NODE cql notification. To fix, only send NEW_NODE notification when the node was not part of the cluster Fixes: #3979 Tests: pushed_notifications_test.py:TestPushedNotifications.restart_node_test Message-Id: <453d750b98b5af510c4637db25b629f07dd90140.1544583244.git.asias@scylladb.com>