Inject ResourceConfig instance (not class) into Jersey

If you inject the class (via a servlet parameter) it seems that
Jersey tries to create all the beans for you (and fails). I thought
it was supposed to work (according to the docs), so I'm a bit confused
but the sample now has Spring DI and the tests pass.

Fixes gh-1981

spring-boot-samples/spring-boot-sample-jersey/src/main/java/sample/jersey/Endpoint.java

@@ -19,19 +19,19 @@ package sample.jersey;
 import javax.ws.rs.GET;
 import javax.ws.rs.Path;
 
-import org.springframework.beans.factory.annotation.Value;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
 
 @Component
 @Path("/hello")
 public class Endpoint {
 
-	@Value("${message:World}")
-	private String msg;
+	@Autowired
+	private Service service;
 
 	@GET
 	public String message() {
-		return "Hello " + this.msg;
+		return "Hello " + this.service.message();
 	}
 
 }