Add fetch = FetchType.LAZY to all relationship declarations.

Change-Id: I22435019234ed092ae07ffd8e61b212416b4dd0f
diff --git a/src/main/java/eu/mulk/mulkcms2/entity/ArticleAlias.java b/src/main/java/eu/mulk/mulkcms2/entity/ArticleAlias.java
index a7c4924..d41e28f 100644
--- a/src/main/java/eu/mulk/mulkcms2/entity/ArticleAlias.java
+++ b/src/main/java/eu/mulk/mulkcms2/entity/ArticleAlias.java
@@ -4,6 +4,7 @@
 import java.util.Objects;
 import javax.persistence.Column;
 import javax.persistence.Entity;
+import javax.persistence.FetchType;
 import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
@@ -43,7 +44,7 @@
     return Objects.hash(alias);
   }
 
-  @ManyToOne
+  @ManyToOne(fetch = FetchType.LAZY)
   @JoinColumn(name = "article", referencedColumnName = "id", nullable = false)
   public Article getArticle() {
     return article;