Deinitialize gatt server properly

Deinitialize gatt server properly

[Model] All
[BinType] AP
[Customer] OPEN

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

[Problem] register gatt server -> bluetoothd terminated abnormally -> unregister gatt server ->
     bt-frwk recovery BT-> register gatt server -> crash
[Cause & Measure] After BT disabled, gatt server is not deinitialized properly.
[Checking Method] n/a

[Team] IoT Hub
[Developer] Injun Yang
[Solution company] Samsung
[Change Type] Specification change

Change-Id: I6f4356e12e05073656d56302d7e6c39883fc96f2
Signed-off-by: injun.yang <injun.yang@samsung.com>
Signed-off-by: DoHyun Pyun <dh79.pyun@samsung.com>