Fix [serial] compiler warnings

Fix serialization warnings by applying @SuppressWarnings("serial")
when appropriate.

In certain cases and for unknown reasons, a correctly-placed
@SuppressWarnings("serial") annotation will fix the warning at the
javac level (i.e. the Gradle command-line), but will produce an
"unnecessary @SuppressWarnings" warning within Eclipse. In these
cases, a private static final serialVersionUID field has been added
with the default value of 1L.

spring-webmvc-portlet/src/test/java/org/springframework/beans/Colour.java

@@ -21,6 +21,7 @@ import org.springframework.core.enums.ShortCodedLabeledEnum;
 /**
  * @author Rob Harrop
  */
+@SuppressWarnings("serial")
 public class Colour extends ShortCodedLabeledEnum {
 
 	public static final Colour RED = new Colour(0, "RED");
@@ -32,4 +33,4 @@ public class Colour extends ShortCodedLabeledEnum {
 		super(code, label);
 	}
 
-}
+}

spring-webmvc-portlet/src/test/java/org/springframework/beans/DerivedTestBean.java

@@ -25,6 +25,7 @@ import org.springframework.beans.factory.DisposableBean;
  * @author Juergen Hoeller
  * @since 21.08.2003
  */
+@SuppressWarnings("serial")
 public class DerivedTestBean extends TestBean implements Serializable, BeanNameAware, DisposableBean {
 
 	private String beanName;
@@ -82,4 +83,4 @@ public class DerivedTestBean extends TestBean implements Serializable, BeanNameA
 		return destroyed;
 	}
 
-}
+}

spring-webmvc-portlet/src/test/java/org/springframework/context/AbstractApplicationContextTests.java

@@ -147,6 +147,7 @@ public abstract class AbstractApplicationContextTests extends AbstractListableBe
 	}
 
 
+	@SuppressWarnings("serial")
 	public static class MyEvent extends ApplicationEvent {
 
 		public MyEvent(Object source) {

spring-webmvc-portlet/src/test/java/org/springframework/web/portlet/handler/SimpleMappingExceptionResolverTests.java

@@ -255,21 +255,25 @@ public class SimpleMappingExceptionResolverTests extends TestCase {
 	}
 
 
+	@SuppressWarnings("serial")
 	private static class SomeOddException extends Exception {
 
 	}
 
 
+	@SuppressWarnings("serial")
 	private static class SomeOddExceptionChild extends SomeOddException {
 
 	}
 
 
+	@SuppressWarnings("serial")
 	private static class NoSubstringMatchesThisException extends SomeOddException {
 
 	}
 
 
+	@SuppressWarnings("serial")
 	private static class AnotherOddException extends Exception {
 
 	}

spring-webmvc-portlet/src/test/java/org/springframework/web/portlet/mvc/annotation/PortletAnnotationControllerTests.java

@@ -440,7 +440,7 @@ public class PortletAnnotationControllerTests extends TestCase {
 	}
 
 	public void testMavResolver() throws Exception {
-		@SuppressWarnings("serial") DispatcherPortlet portlet = new DispatcherPortlet() {
+		DispatcherPortlet portlet = new DispatcherPortlet() {
 			@Override
 			protected ApplicationContext createPortletApplicationContext(ApplicationContext parent) throws BeansException {
 				GenericWebApplicationContext wac = new GenericWebApplicationContext();