Refactored DelimitedLineTokenizer to use vargs

This commit updates the DelimitedLineTokenizer to use vargs instead of
arrays for ease of configuration.

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/file/transform/AbstractLineTokenizer.java

@@ -79,7 +79,7 @@ public abstract class AbstractLineTokenizer implements LineTokenizer {
 	 * 
 	 * @param names names of each column
 	 */
-	public void setNames(String[] names) {
+	public void setNames(String... names) {
 		this.names = names==null ? null : Arrays.asList(names).toArray(new String[names.length]);
 	}
 

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/file/transform/DelimitedLineTokenizer.java

@@ -105,7 +105,7 @@ public class DelimitedLineTokenizer extends AbstractLineTokenizer
 	 *
 	 * @param includedFields the included fields to set
 	 */
-	public void setIncludedFields(int[] includedFields) {
+	public void setIncludedFields(int... includedFields) {
 		this.includedFields = new HashSet<>();
 		for (int i : includedFields) {
 			this.includedFields.add(i);