[3/6] fd passing: use fd directly without opening it

[3/6] fd passing: use fd directly without opening it

 - delete open function
 - change parameter fd to handle because handle can have multiple fd
 - remove unnecessary functions.

Change-Id: I6a326d7047e4602604d3becf61dd5b1342666edf
Signed-off-by: Segwon <segwon.han@samsung.com>