Consistent Class array vs vararg declarations (and related polishing)

(cherry picked from commit 3b810f3)

spring-messaging/src/test/java/org/springframework/messaging/handler/annotation/support/HeaderMethodArgumentResolverTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -60,7 +60,7 @@ public class HeaderMethodArgumentResolverTests {
 
 
 	@Before
-	public void setup() throws Exception {
+	public void setup() {
 		@SuppressWarnings("resource")
 		GenericApplicationContext cxt = new GenericApplicationContext();
 		cxt.refresh();