INT-3820: Fix MethodInvokerHelper for the Proxy

JIRA: https://jira.spring.io/browse/INT-3820

Some Proxy may be based on the specif non-user classes and advised with
the provided end-user interfaces.
The best sample is `@Repository` from Spring Data projects.
In this case the `MessagingMethodInvokerHelper` just missed the user interfaces
to consider for the candidate methods or thrown an `Exception` like `NoSuchMethodError`.

* Add `((Advised) targetObject).getProxiedInterfaces()` for the scanning algorithm
* Move the `UniqueMethodFilter` to the internal `Set<Method>` to allow iteration
and filtering for methods from the `targetClass` as well as from all those user interfaces
* Add Spring JPA repository test-case
* Polishing form some time-weak tests

Revert MessagingMethodInvokerHelper

INT-3820: Simple Proxy Interface Method Matching

No-risk solution for INT-3820.

Instead of considering all interfaces on the proxy, only look at proxy interfaces
for a single matching method name if we find no candidate or fallback methods.

Consider the complete solution for 4.3.

Add `Message<?>` method distinguishing

spring-integration-stream/src/test/java/org/springframework/integration/stream/CharacterStreamWritingMessageHandlerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2010 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.
@@ -201,6 +201,7 @@ public class CharacterStreamWritingMessageHandlerTests {
 		public String toString() {
 			return this.text;
 		}
+
 	}
 
 
@@ -225,7 +226,7 @@ public class CharacterStreamWritingMessageHandlerTests {
 
 		public void await() {
 			try {
-				this.latch.await(1000, TimeUnit.MILLISECONDS);
+				this.latch.await(10000, TimeUnit.MILLISECONDS);
 				if (latch.getCount() != 0) {
 					throw new RuntimeException("test timeout");
 				}
@@ -234,6 +235,7 @@ public class CharacterStreamWritingMessageHandlerTests {
 				throw new RuntimeException("test latch.await() interrupted");
 			}
 		}
+
 	}
 
 }