Code Polishing (Sonar)

- remove redundant modifiers
- overridable methods called from ctors

Polishing - PR Comments

spring-integration-mail/src/main/java/org/springframework/integration/mail/AbstractMailReceiver.java

@@ -458,7 +458,7 @@ public abstract class AbstractMailReceiver extends IntegrationObjectSupport impl
 
 		private final MimeMessage source;
 
-		public IntegrationMimeMessage(MimeMessage source) throws MessagingException {
+		private IntegrationMimeMessage(MimeMessage source) throws MessagingException {
 			super(source);
 			this.source = source;
 		}

spring-integration-mail/src/main/java/org/springframework/integration/mail/MailReceiver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -32,7 +32,7 @@ public interface MailReceiver {
 
 	javax.mail.Message[] receive() throws javax.mail.MessagingException;
 
-	public static class MailReceiverContext {
+	class MailReceiverContext {
 
 		private final Folder folder;
 
@@ -55,4 +55,5 @@ public interface MailReceiver {
 			return folder;
 		}
 	}
+
 }