Fix unittests

scm-core/src/main/java/sonia/scm/repository/Namespace.java

@@ -109,6 +109,14 @@ public class Namespace implements PermissionObject, Cloneable {
       .toHashCode();
   }
 
+  @Override
+  public String toString() {
+    return "Namespace{" +
+      "namespace='" + namespace + '\'' +
+      ", permissions=" + permissions +
+      '}';
+  }
+
   @Override
   public Namespace clone() {
     try {