Process response_needed parameter in GATT Server

Process response_needed parameter in GATT Server

[Model] COMMON
[BinType] AP
[Customer] OPEN

[Issue#] N/A
[Request] Internal
[Occurrence Version] N/A

[Problem] User couldn't know whether this write request require a
 response or not
[Cause & Measure] Old bluez didn't provide the information about
 response's necessity. Now bluez provides it so processing logic has been
 implemented in this patch.
[Checking Method] Run GATT Server on DUT -> Send some Write Without
 Response or Write Req from remote

[Team] Basic connection
[Developer] Seungyoun Ju
[Solution company] Samsung
[Change Type] Specification change

Change-Id: If519f964c86f7c786b92febc1104358184aef427