Move 'samples' into 'tests' folder

Some of the samples are more like pure integratiuon tests (I wouldn't
use them to copy code into a real app). So I put them with the other
"test" projects.

tests/samples-messaging-integration/src/main/java/com/example/BookService.java

@@ -0,0 +1,47 @@
+/*
+ *  Copyright 2013-2016 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.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.example;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.messaging.MessageChannel;
+import org.springframework.messaging.support.MessageBuilder;
+import org.springframework.stereotype.Service;
+
+@Service
+public class BookService {
+
+	private static final Logger log = LoggerFactory.getLogger(BookService.class);
+
+	private @Autowired @Qualifier("outputChannel") MessageChannel outputChannel;
+
+	/**
+	 * Scenario for "should generate tests triggered by a method": client side: must have
+	 * a possibility to "trigger" sending of a message to the given messageFrom server
+	 * side: will run the method and await upon receiving message on the output
+	 * messageFrom
+	 * 
+	 * Method triggers sending a message to a source
+	 */
+	public void returnBook(BookReturned bookReturned) {
+		log.info("Returning book " + bookReturned);
+		outputChannel.send(MessageBuilder.withPayload(bookReturned)
+				.setHeader("BOOK-NAME", bookReturned.bookName).build());
+	}
+}