Feature, classes, use relative reference

Change-Id: I1942580e78d3c9e83fdad4927532186441fe3298
diff --git a/test/model/extensions/classes/second.yml b/test/model/extensions/classes/second.yml
index a9babd3..929d746 100644
--- a/test/model/extensions/classes/second.yml
+++ b/test/model/extensions/classes/second.yml
@@ -1,5 +1,6 @@
 classes:
 - first
+- relative
 
 parameters:
   will: