Fix race in TestJetStreamClusterGhostEphemeralsAfterRestart

Signed-off-by: Neil Twigg <neil@nats.io>

Author: neilalexander

server/jetstream_cluster_3_test.go

@@ -1600,10 +1600,12 @@ func TestJetStreamClusterParallelConsumerCreation(t *testing.T) {
 }
 
 func TestJetStreamClusterGhostEphemeralsAfterRestart(t *testing.T) {
-	consumerNotActiveStartInterval = time.Second * 5
-	defer func() {
+	consumerNotActiveStartInterval = time.Second
+	consumerNotActiveMaxInterval = time.Second
+	t.Cleanup(func() {
 		consumerNotActiveStartInterval = defaultConsumerNotActiveStartInterval
-	}()
+		consumerNotActiveMaxInterval = defaultConsumerNotActiveMaxInterval
+	})
 
 	c := createJetStreamClusterExplicit(t, "R3S", 3)
 	defer c.shutdown()