Removed Camel support (#387)

until https://issues.apache.org/jira/browse/CAMEL-11430 gets fixed

fixes #386

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

@@ -1,43 +0,0 @@
-/*
- *  Copyright 2013-2017 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.apache.camel.Exchange;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.stereotype.Service;
-
-@Service
-public class BookService {
-
-	private static final Logger log = LoggerFactory.getLogger(BookService.class);
-
-	/**
-	 * 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(Exchange exchange) {
-		BookReturned bookReturned = exchange.getIn().getBody(BookReturned.class);
-		log.info("Returning book [$bookReturned]");
-		exchange.getOut().setBody(bookReturned);
-		exchange.getOut().setHeader("BOOK-NAME", bookReturned.bookName);
-	}
-}