g_timeout_add_seconds register timer callback with G_PRIORITY_DEFAULT(0),
but g_idler_add with G_PRIORITY_DEFAULT_IDLE(200).
We need to ensure that the queue_job() invoked before exit_server().
Change-Id: I1cbb3d198cd2ced4def64924abe10c97922a3fd7 Signed-off-by: Sangyoon Jang <s89.jang@samsung.com>