cosmetic: add toString method to ReadOnlyValueMapDecorator

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk/testing/mocks/resourceresolver-mock@1702311 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/sling/testing/resourceresolver/ReadonlyValueMapDecorator.java b/src/main/java/org/apache/sling/testing/resourceresolver/ReadonlyValueMapDecorator.java
index 78d0842..29a7678 100644
--- a/src/main/java/org/apache/sling/testing/resourceresolver/ReadonlyValueMapDecorator.java
+++ b/src/main/java/org/apache/sling/testing/resourceresolver/ReadonlyValueMapDecorator.java
@@ -103,4 +103,9 @@
         return delegate;
     }
 
+    @Override
+    public String toString() {
+        return delegate.toString();
+    }
+
 }