Fix suffix of test classes names

As per Spring Framework code style [1], the suffix of
test classes should be "Tests". This commit fixes that
for some classes that do not conform to the code style.

[1]: https://github.com/spring-projects/spring-framework/wiki/Code-Style#tests

spring-batch-infrastructure/src/test/java/org/springframework/batch/item/file/mapping/BeanWrapperFieldSetMapperFuzzyMatchingTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2007 the original author or authors.
+ * Copyright 2006-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,7 +22,7 @@ import org.springframework.batch.item.file.transform.DelimitedLineTokenizer;
 import org.springframework.beans.NotWritablePropertyException;
 import org.springframework.validation.BindException;
 
-public class BeanWrapperFieldSetMapperFuzzyMatchingTest {
+public class BeanWrapperFieldSetMapperFuzzyMatchingTests {
 
 	@Test(expected = NotWritablePropertyException.class)
 	public void testFuzzyMatchingWithKeyCandidateCollision() throws BindException {

spring-batch-infrastructure/src/test/java/org/springframework/batch/item/json/GsonJsonObjectMarshallerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018 the original author or authors.
+ * Copyright 2018-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,7 +22,7 @@ import org.junit.Test;
 /**
  * @author Mahmoud Ben Hassine
  */
-public class GsonJsonObjectMarshallerTest {
+public class GsonJsonObjectMarshallerTests {
 
 	@Test
 	public void testJsonMarshalling() {

spring-batch-infrastructure/src/test/java/org/springframework/batch/item/json/JacksonJsonObjectMarshallerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018 the original author or authors.
+ * Copyright 2018-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,7 +22,7 @@ import org.junit.Test;
 /**
  * @author Mahmoud Ben Hassine
  */
-public class JacksonJsonObjectMarshallerTest {
+public class JacksonJsonObjectMarshallerTests {
 
 	@Test
 	public void testJsonMarshalling() {

spring-batch-infrastructure/src/test/java/org/springframework/batch/item/json/builder/JsonFileItemWriterBuilderTests.java

@@ -39,7 +39,7 @@ import static org.junit.Assert.assertTrue;
  * @author Mahmoud Ben Hassine
  * @author Glenn Renfro
  */
-public class JsonFileItemWriterBuilderTest {
+public class JsonFileItemWriterBuilderTests {
 
 	private Resource resource;
 	private JsonObjectMarshaller<String> jsonObjectMarshaller;

spring-batch-infrastructure/src/test/java/org/springframework/batch/item/json/builder/JsonItemReaderBuilderTests.java

@@ -33,7 +33,7 @@ import static org.springframework.test.util.ReflectionTestUtils.getField;
 /**
  * @author Mahmoud Ben Hassine
  */
-public class JsonItemReaderBuilderTest {
+public class JsonItemReaderBuilderTests {
 
 	@Rule
 	public MockitoRule rule = MockitoJUnit.rule().silent();

spring-batch-infrastructure/src/test/java/org/springframework/batch/item/validator/BeanValidatingItemProcessorTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018 the original author or authors.
+ * Copyright 2018-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,7 +24,7 @@ import org.junit.Test;
 /**
  * @author Mahmoud Ben Hassine
  */
-public class BeanValidatingItemProcessorTest {
+public class BeanValidatingItemProcessorTests {
 
 	@Test
 	public void testValidObjectValidation() throws Exception {