Fix mapping update bug in H2, MySQL, TiDB storage (#1999)

* Service inventory mapping  doesn't update right.

* Remove codes.

oap-server/server-storage-plugin/storage-jdbc-hikaricp-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/jdbc/h2/dao/H2SQLExecutor.java

@@ -74,7 +74,7 @@ public class H2SQLExecutor {
 
     protected StorageData toStorageData(ResultSet rs, String modelName,
         StorageBuilder storageBuilder) throws SQLException {
-        while (rs.next()) {
+        if (rs.next()) {
             Map data = new HashMap();
             List<ModelColumn> columns = TableMetaInfo.get(modelName).getColumns();
             for (ModelColumn column : columns) {

oap-server/server-storage-plugin/storage-jdbc-hikaricp-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/jdbc/h2/dao/H2ServiceInventoryCacheDAO.java

@@ -19,13 +19,17 @@
 package org.apache.skywalking.oap.server.storage.plugin.jdbc.h2.dao;
 
 import java.io.IOException;
-import java.sql.*;
-import java.util.*;
+import java.sql.Connection;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
 import org.apache.skywalking.oap.server.core.register.ServiceInventory;
 import org.apache.skywalking.oap.server.core.storage.cache.IServiceInventoryCacheDAO;
 import org.apache.skywalking.oap.server.library.client.jdbc.hikaricp.JDBCHikariCPClient;
 import org.apache.skywalking.oap.server.library.util.BooleanUtils;
-import org.slf4j.*;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * @author wusheng
@@ -68,12 +72,14 @@ public class H2ServiceInventoryCacheDAO extends H2SQLExecutor implements IServic
 
             try (Connection connection = h2Client.getConnection()) {
                 try (ResultSet resultSet = h2Client.executeQuery(connection, sql.toString(), BooleanUtils.TRUE, System.currentTimeMillis() - 30 * 60 * 1000)) {
-                    while (resultSet.next()) {
-                        ServiceInventory serviceInventory = (ServiceInventory)toStorageData(resultSet, ServiceInventory.MODEL_NAME, new ServiceInventory.Builder());
+                    ServiceInventory serviceInventory;
+                    do {
+                        serviceInventory = (ServiceInventory)toStorageData(resultSet, ServiceInventory.MODEL_NAME, new ServiceInventory.Builder());
                         if (serviceInventory != null) {
                             serviceInventories.add(serviceInventory);
                         }
                     }
+                    while (serviceInventory != null);
                 }
             } catch (SQLException e) {
                 throw new IOException(e);