passes missing chunk_size.

formats the sets of parameters the same so that you can see they are all there.
including the missing one that fixes this error:

    obj = container.upload_file(pf, obj_name = self.key_id)
  File "/home/carl/.virtualenvs/veyepar/local/lib/python2.7/site-packages/pyrax/object_storage.py", line 477, in upload_file
    return_none=return_none)
  File "/home/carl/.virtualenvs/veyepar/local/lib/python2.7/site-packages/pyrax/object_storage.py", line 429, in create
    return_none=return_none)
  File "/home/carl/.virtualenvs/veyepar/local/lib/python2.7/site-packages/pyrax/object_storage.py", line 1858, in create
    headers)
TypeError: _upload() takes exactly 10 arguments (9 given)