[dev] Add disk properties for disk reservation

generators/lib/hash/hash.rb

@@ -143,7 +143,8 @@ class ::Hash
 
   # Custom iterator. Only consider entries corresponding to cluster_list and node_list. Sorted by node_uid.
   def each_filtered_node_uid(cluster_list, node_list)
-    self.each_sort_by_node_uid { |node_uid, properties| 
+    self.each_sort_by_node_uid { |key, properties|
+      node_uid, = key
       cluster_uid = node_uid.split(/-/).first
 
       if (! cluster_list || cluster_list.include?(cluster_uid)) &&