HDFS-15671. testBalancerRPCDelayQpsDefault fails intermittently (#3097)

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancer.java

@@ -655,9 +655,11 @@ public class TestBalancer {
     int numOfDatanodes = capacities.length;
 
     try {
-      cluster = new MiniDFSCluster.Builder(conf)
-                                  .numDataNodes(0)
-                                  .build();
+      cluster = new MiniDFSCluster
+          .Builder(conf)
+          .numDataNodes(0)
+          .setNNRedundancyConsiderLoad(false)
+          .build();
       cluster.getConfiguration(0).setInt(DFSConfigKeys.DFS_REPLICATION_KEY,
           DFSConfigKeys.DFS_REPLICATION_DEFAULT);
       conf.setInt(DFSConfigKeys.DFS_REPLICATION_KEY,