HDFS-14247. Repeat adding node description into network topology. Contributed by HuangTao.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java

@@ -1134,7 +1134,6 @@ public class DatanodeManager {
           nodeDescr.setDependentHostNames(
               getNetworkDependenciesWithDefault(nodeDescr));
         }
-        networktopology.add(nodeDescr);
         nodeDescr.setSoftwareVersion(nodeReg.getSoftwareVersion());
         resolveUpgradeDomain(nodeDescr);