[HUDI-159] Redesigning bundles for lighter-weight integrations

- Documented principles applied for redesign at packaging/README.md
 - No longer depends on incl commons-codec, commons-io, commons-pool, commons-dbcp, commons-lang, commons-logging, avro-mapred
 - Introduce new FileIOUtils & added checkstyle rule for illegal import of above
 - Parquet, Avro dependencies moved to provided scope to enable being picked up from Hive/Spark/Presto instead
 - Pickup jackson jars for Hive sync tool from HIVE_HOME & unbundling jackson everywhere
 - Remove hive-jdbc standalone jar from being bundled in Spark/Hive/Utilities bundles
 - 6.5x reduced number of classes across bundles

hudi-cli/src/main/java/org/apache/hudi/cli/commands/RollbacksCommand.java

@@ -26,7 +26,6 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.stream.Stream;
-import org.apache.commons.lang3.tuple.Pair;
 import org.apache.hudi.avro.model.HoodieRollbackMetadata;
 import org.apache.hudi.cli.HoodieCLI;
 import org.apache.hudi.cli.HoodiePrintHelper;
@@ -37,6 +36,7 @@ import org.apache.hudi.common.table.timeline.HoodieActiveTimeline;
 import org.apache.hudi.common.table.timeline.HoodieInstant;
 import org.apache.hudi.common.table.timeline.HoodieInstant.State;
 import org.apache.hudi.common.util.AvroUtils;
+import org.apache.hudi.common.util.collection.Pair;
 import org.springframework.shell.core.CommandMarker;
 import org.springframework.shell.core.annotation.CliCommand;
 import org.springframework.shell.core.annotation.CliOption;

hudi-cli/src/main/java/org/apache/hudi/cli/utils/HiveUtil.java

@@ -19,11 +19,10 @@
 package org.apache.hudi.cli.utils;
 
 import java.sql.Connection;
+import java.sql.DriverManager;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
-import javax.sql.DataSource;
-import org.apache.commons.dbcp.BasicDataSource;
 import org.apache.hudi.common.table.HoodieTableMetaClient;
 import org.joda.time.DateTime;
 
@@ -42,17 +41,8 @@ public class HiveUtil {
   private static Connection connection;
 
   private static Connection getConnection(String jdbcUrl, String user, String pass) throws SQLException {
-    DataSource ds = getDatasource(jdbcUrl, user, pass);
-    return ds.getConnection();
-  }
-
-  private static DataSource getDatasource(String jdbcUrl, String user, String pass) {
-    BasicDataSource ds = new BasicDataSource();
-    ds.setDriverClassName(driverName);
-    ds.setUrl(jdbcUrl);
-    ds.setUsername(user);
-    ds.setPassword(pass);
-    return ds;
+    connection = DriverManager.getConnection(jdbcUrl, user, pass);
+    return connection;
   }
 
   public static long countRecords(String jdbcUrl, HoodieTableMetaClient source, String dbName, String user, String pass)

hudi-cli/src/main/java/org/apache/hudi/cli/utils/SparkUtil.java

@@ -20,10 +20,10 @@ package org.apache.hudi.cli.utils;
 
 import java.io.File;
 import java.net.URISyntaxException;
-import org.apache.commons.lang.StringUtils;
 import org.apache.hudi.HoodieWriteClient;
 import org.apache.hudi.cli.commands.SparkMain;
 import org.apache.hudi.common.util.FSUtils;
+import org.apache.hudi.common.util.StringUtils;
 import org.apache.log4j.Logger;
 import org.apache.spark.SparkConf;
 import org.apache.spark.api.java.JavaSparkContext;
@@ -43,7 +43,7 @@ public class SparkUtil {
     SparkLauncher sparkLauncher = new SparkLauncher().setAppResource(currentJar)
         .setMainClass(SparkMain.class.getName());
 
-    if (StringUtils.isNotEmpty(propertiesFile)) {
+    if (!StringUtils.isEmpty(propertiesFile)) {
       sparkLauncher.setPropertiesFile(propertiesFile);
     }