Changes to List playlists

added the optional property playlist/items/playlist_folder_id to the response with the 200 status

added the optional property playlist/items/playlist_folder_sort_order to the response with the 200 status

api operation id playlists was added

added the non-success response with the status 401

added the non-success response with the status 403

added the non-success response with the status 404

added the non-success response with the status 500

added the required property playlist/items/items/oneOf[subschema #1]/items/id to the response with the 200 status

added the required property playlist/items/items/oneOf[subschema #1]/items/playlisttrack to the response with the 200 status

added the required property md5 to the response with the 200 status

added the required property playlist to the response with the 200 status

added the required property total_count to the response with the 200 status

added the non-success response with the status 400