Prepend file:// to node_uri in yaml_fs

Signed-off-by: martin f. krafft <madduck@madduck.net>
diff --git a/reclass/storage/yaml_fs/__init__.py b/reclass/storage/yaml_fs/__init__.py
index 933def3..fb10dc0 100644
--- a/reclass/storage/yaml_fs/__init__.py
+++ b/reclass/storage/yaml_fs/__init__.py
@@ -45,7 +45,7 @@
             # result of the iteration, so that elements at the current level
             # overwrite stuff defined by parents
             merge_base.merge(entity)
-            return merge_base, path
+            return merge_base, 'file://{0}'.format(path)
 
         except reclass.errors.NotFoundError, e:
             self._handle_read_error(e, name, base_uri, nodename)