Fixed - Adding a new slave node in redis-cluster, isSlaveNotUsed does not take effect

Signed-off-by: seakider <seakider@gmail.com>

redisson/src/main/java/org/redisson/connection/ClusterConnectionManager.java

@@ -641,6 +641,10 @@ public class ClusterConnectionManager extends MasterSlaveConnectionManager {
                 futures.add(slaveUpFuture);
                 continue;
             }
+            
+            if (config.isSlaveNotUsed()) {
+                continue;
+            }
 
             CompletableFuture<Void> slaveUpFuture = entry.addSlave(uri, configEndpointHostName);
             CompletableFuture<Void> f = slaveUpFuture.thenAccept(res -> {