Align with latest changes in Spring Data REST

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/rest/RepositoryRestMvcAutoConfigurationTests.java

 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -18,7 +18,6 @@ package org.springframework.boot.autoconfigure.data.rest;
 
 import java.net.URI;
 import java.util.Date;
-import java.util.Map;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
@@ -40,7 +39,7 @@ import org.springframework.context.annotation.Import;
 import org.springframework.data.rest.core.config.RepositoryRestConfiguration;
 import org.springframework.data.rest.core.mapping.RepositoryDetectionStrategy.RepositoryDetectionStrategies;
 import org.springframework.data.rest.webmvc.BaseUri;
-import org.springframework.data.rest.webmvc.config.RepositoryRestConfigurerAdapter;
+import org.springframework.data.rest.webmvc.config.RepositoryRestConfigurer;
 import org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration;
 import org.springframework.http.MediaType;
 import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
@@ -146,24 +145,6 @@ public class RepositoryRestMvcAutoConfigurationTests {
 		assertThat(bean.getBaseUri()).isEqualTo(URI.create(""));
 	}
 
-	@Test
-	public void objectMappersAreConfiguredUsingObjectMapperBuilder()
-			throws JsonProcessingException {
-		load(TestConfigurationWithObjectMapperBuilder.class);
-
-		assertThatDateIsFormattedCorrectly("halObjectMapper");
-		assertThatDateIsFormattedCorrectly("objectMapper");
-	}
-
-	@Test
-	public void primaryObjectMapperIsAvailable() {
-		load(TestConfiguration.class);
-		Map<String, ObjectMapper> objectMappers = this.context
-				.getBeansOfType(ObjectMapper.class);
-		assertThat(objectMappers.size()).isGreaterThan(1);
-		this.context.getBean(ObjectMapper.class);
-	}
-
 	public void assertThatDateIsFormattedCorrectly(String beanName)
 			throws JsonProcessingException {
 		ObjectMapper objectMapper = this.context.getBean(beanName, ObjectMapper.class);
@@ -221,7 +202,7 @@ public class RepositoryRestMvcAutoConfigurationTests {
 
 	}
 
-	static class TestRepositoryRestConfigurer extends RepositoryRestConfigurerAdapter {
+	static class TestRepositoryRestConfigurer implements RepositoryRestConfigurer {
 
 		@Override
 		public void configureRepositoryRestConfiguration(