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-context-support/src/main/java/org/springframework/mail/MailAuthenticationException.java

@@ -22,6 +22,7 @@ package org.springframework.mail;
  * @author Dmitriy Kopylenko
  * @author Juergen Hoeller
  */
+@SuppressWarnings("serial")
 public class MailAuthenticationException extends MailException {
 
 	/**

spring-context-support/src/main/java/org/springframework/mail/MailException.java

@@ -23,6 +23,7 @@ import org.springframework.core.NestedRuntimeException;
  *
  * @author Dmitriy Kopylenko
  */
+@SuppressWarnings("serial")
 public abstract class MailException extends NestedRuntimeException {
 
 	/**

spring-context-support/src/main/java/org/springframework/mail/MailParseException.java

@@ -22,6 +22,7 @@ package org.springframework.mail;
  * @author Dmitriy Kopylenko
  * @author Juergen Hoeller
  */
+@SuppressWarnings("serial")
 public class MailParseException extends MailException {
 
 	/**

spring-context-support/src/main/java/org/springframework/mail/MailPreparationException.java

@@ -25,6 +25,7 @@ package org.springframework.mail;
  * @see org.springframework.ui.velocity.VelocityEngineUtils#mergeTemplateIntoString
  * @see org.springframework.ui.freemarker.FreeMarkerTemplateUtils#processTemplateIntoString
  */
+@SuppressWarnings("serial")
 public class MailPreparationException extends MailException {
 
 	/**

spring-context-support/src/main/java/org/springframework/mail/MailSendException.java

@@ -30,6 +30,7 @@ import org.springframework.util.ObjectUtils;
  * @author Dmitriy Kopylenko
  * @author Juergen Hoeller
  */
+@SuppressWarnings("serial")
 public class MailSendException extends MailException {
 
 	private transient final Map<Object, Exception> failedMessages;

spring-context-support/src/main/java/org/springframework/mail/SimpleMailMessage.java

@@ -39,6 +39,7 @@ import org.springframework.util.Assert;
  * @see org.springframework.mail.javamail.MimeMessageHelper
  * @see org.springframework.mail.javamail.MimeMailMessage
  */
+@SuppressWarnings("serial")
 public class SimpleMailMessage implements MailMessage, Serializable {
 
 	private String from;

spring-context-support/src/main/java/org/springframework/scheduling/quartz/CronTriggerBean.java

@@ -61,6 +61,7 @@ import org.springframework.util.Assert;
  * @see SchedulerFactoryBean#setJobDetails
  * @see SimpleTriggerBean
  */
+@SuppressWarnings("serial")
 public class CronTriggerBean extends CronTrigger
 		implements JobDetailAwareTrigger, BeanNameAware, InitializingBean {
 

spring-context-support/src/main/java/org/springframework/scheduling/quartz/JobDetailBean.java

@@ -48,6 +48,7 @@ import org.springframework.context.ApplicationContextAware;
  * @see org.springframework.beans.factory.BeanNameAware
  * @see org.quartz.Scheduler#DEFAULT_GROUP
  */
+@SuppressWarnings("serial")
 public class JobDetailBean extends JobDetail
 		implements BeanNameAware, ApplicationContextAware, InitializingBean {
 

spring-context-support/src/main/java/org/springframework/scheduling/quartz/JobMethodInvocationFailedException.java

@@ -28,6 +28,7 @@ import org.springframework.util.MethodInvoker;
  * @since 2.5.3
  * @see MethodInvokingJobDetailFactoryBean
  */
+@SuppressWarnings("serial")
 public class JobMethodInvocationFailedException extends NestedRuntimeException {
 
 	/**

spring-context-support/src/main/java/org/springframework/scheduling/quartz/SimpleTriggerBean.java

@@ -60,6 +60,7 @@ import org.springframework.core.Constants;
  * @see SchedulerFactoryBean#setJobDetails
  * @see CronTriggerBean
  */
+@SuppressWarnings("serial")
 public class SimpleTriggerBean extends SimpleTrigger
 		implements JobDetailAwareTrigger, BeanNameAware, InitializingBean {