Revert "Replacing Apache commons-lang3 object serializer with Kryo serializer"

This reverts commit a6c45feb2c.

hoodie-common/src/test/java/com/uber/hoodie/common/util/TestSerializationUtils.java

@@ -1,70 +0,0 @@
-/*
- *  Copyright (c) 2019 Uber Technologies, Inc. (hoodie-dev-group@uber.com)
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *           http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-package com.uber.hoodie.common.util;
-
-import java.io.IOException;
-import java.util.Arrays;
-import java.util.LinkedList;
-import org.apache.avro.util.Utf8;
-import org.junit.Assert;
-import org.junit.Test;
-
-public class TestSerializationUtils {
-
-  @Test
-  public void testSerDeser() throws IOException {
-    // It should handle null object references.
-    verifyObject(null);
-    // Object with nulls.
-    verifyObject(new NonSerializableClass(null));
-    // Object with valid values & no default constructor.
-    verifyObject(new NonSerializableClass("testValue"));
-    // Object which is of non-serializable class.
-    verifyObject(new Utf8("test-key"));
-    // Verify serialization of list.
-    verifyObject(new LinkedList<>(Arrays.asList(2, 3, 5)));
-  }
-
-  private <T> void verifyObject(T expectedValue) throws IOException {
-    byte[] serializedObject = SerializationUtils.serialize(expectedValue);
-    Assert.assertTrue(serializedObject != null && serializedObject.length > 0);
-
-    final T deserializedValue = SerializationUtils.<T>deserialize(serializedObject);
-    if (expectedValue == null) {
-      Assert.assertNull(deserializedValue);
-    } else {
-      Assert.assertTrue(expectedValue.equals(deserializedValue));
-    }
-  }
-
-  private static class NonSerializableClass {
-    private String id;
-
-    NonSerializableClass(String id) {
-      this.id = id;
-    }
-
-    @Override
-    public boolean equals(Object obj) {
-      if (!(obj instanceof  NonSerializableClass)) {
-        return false;
-      }
-      return id == null ? ((NonSerializableClass) obj).id == null
-          : id.equals(((NonSerializableClass) obj).id);
-    }
-  }
-}