rails/rails — pull request #6711 by takkanm (2012-06-12 09:16:51+00:00)
Title: fix method redefined warning in Ruby2.0

I found following warning in Ruby2.0.0dev(2012-06-12 trunk 36037).

```
activesuｰport/lib/active_support/core_ext/load_error.rb:9: warning: method redefined; discarding old path
```

Ruby2.0 already has LoadError#path.

see http://bugs.ruby-lang.org/issues/show/5221