Fix test

Author: igdianov

tests/boot-starter/src/test/java/com/introproventures/graphql/jpa/query/boot/test/autoconfigure/GraphQLJpaQueryGraphQlSourceAutoConfigurationTest.java

@@ -79,6 +79,6 @@ public void contextIsAutoConfigured() {
         DataLoaderRegistry dataLoaderRegistry = newRegistry().build();
         batchLoaderRegistry.registerDataLoaders(dataLoaderRegistry, newContext().build());
 
-        assertThat(dataLoaderRegistry.getDataLoadersMap()).isEmpty();
+        assertThat(dataLoaderRegistry.getDataLoadersMap()).isNotEmpty().containsOnlyKeys("Author.books", "Book.author");
     }
 }