Fix for DATAREST-72. ResourceMapping.isExported() is now considered for displaying the link to the repository or when building the metadata for the request. Now sends back a 404 when a repository is not exported and an attempt to access it is made.

spring-data-rest-example/src/main/java/org/springframework/data/rest/example/mongodb/ProfileRepository.java

@@ -1,9 +1,11 @@
 package org.springframework.data.rest.example.mongodb;
 
 import org.springframework.data.repository.CrudRepository;
+import org.springframework.data.rest.repository.annotation.RestResource;
 
 /**
  * @author Jon Brisbin
  */
+@RestResource(exported = false)
 public interface ProfileRepository extends CrudRepository<Profile, String> {
 }