Populate custom ExceptionHandlerExceptionResolver with ApplicationContext.

Fixes #2245.
Original pull request #2246.

Author: Will Fleury

spring-data-rest-webmvc/src/main/java/org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.java

@@ -151,6 +151,7 @@
  * @author Greg Turnquist
  * @author Mark Paluch
  * @author Christoph Strobl
+ * @author Will Fleury
  */
 @Configuration(proxyBeanMethods = false)
 @EnableHypermediaSupport(type = { HypermediaType.HAL, HypermediaType.HAL_FORMS })
@@ -764,6 +765,7 @@ public ExcerptProjector excerptProjector(RepositoryResourceMappings resourceMapp
 	public void extendHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {
 
 		ExceptionHandlerExceptionResolver er = new ExceptionHandlerExceptionResolver();
+		er.setApplicationContext(applicationContext);
 		er.setCustomArgumentResolvers(defaultMethodArgumentResolvers(selfLinkProvider.get(),
 				persistentEntityArgumentResolver.get(), persistentEntityResourceAssemblerArgumentResolver.get(),
 				repoRequestArgumentResolver.get()));