modify cbor method logic.

modify cbor method logic.

1. remove unnecessary method (parser devodeDeviceId)
2. Add Exception, when payload is null.

Change-Id: Idfffe24425c2c1f9c9f98f7efe1837bfc080b554
Signed-off-by: Jung Seungho <shonest.jung@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/10697
Reviewed-by: Yeonghun Nam <yeonghun.nam@samsung.com>
Reviewed-by: Glen Youngjin Kim <glen.kim@samsung.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Jee Hyeok Kim <jihyeok13.kim@samsung.com>