GH-12: Remove Jersey dependency from tutorial app

Fixes GH-12 (https://github.com/spring-projects/spring-amqp-samples/issues/12)

Now we have such a report:
```
EmbeddedServletContainerAutoConfiguration did not match
    - not a web application (OnWebApplicationCondition)
```

rabbitmq-tutorials/pom.xml

@@ -34,11 +34,6 @@
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
-
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-jersey</artifactId>
-		</dependency>
 	</dependencies>
 
 	<build>

rabbitmq-tutorials/src/main/resources/application.yml

@@ -8,4 +8,4 @@ logging:
 
 tutorial:
   client:
-    duration: 10000
+    duration: 10000