BUG: #10565 Series.name lost in rolling_* funcions
Addresses #10565

Looks good to me... anyone else?
 Sure. I think @sinhrks has been closing a bunch of these losing names issues. Is there a master list somewhere?
 @chris-b1 thanks!
 @TomAugspurger There is no master tracker for `Series.name`, but only for `Index.name` (#9862). I'll change this to list both `Series.name` and `Index.name`.
