Upgrade to spring-boot 1.4.0

Remove redundant dependency and rely on the provided by `spring-boot-starter-amqp`

rabbitmq-tutorials/pom.xml

@@ -14,7 +14,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>1.3.1.RELEASE</version>
+		<version>1.4.0.RELEASE</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
@@ -29,17 +29,12 @@
 			<artifactId>spring-boot-starter-amqp</artifactId>
 		</dependency>
 
-		<dependency>
-			<groupId>org.springframework.amqp</groupId>
-			<artifactId>spring-rabbit</artifactId>
-			<version>1.6.0.RELEASE</version>
-		</dependency>
-
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
+
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-jersey</artifactId>