Fix bug: Wrong key to LO_Hash

lib/tasks/dbInfo.rake

@@ -89,8 +89,7 @@ namespace :dbinfo do
 
         learning_objects.each do |lo|
           # Verify duplicity using LO's unique attributes
-          # item_key = encode_hash_from learning_object_unique_attributes(lo)
-          lo_key = encode_hash_from lo.name
+          item_key = encode_hash_from learning_object_unique_attributes(lo)
           if lo_hash[lo_key].nil?
             lo_hash[lo_key] = Array.new
           end