Changed the logic to add option list in pdu.

Changed the logic to add option list in pdu.

resource uri has become null when CASendResponse API use
large payload. because we failed to add option in pdu.
so we fixed the code to add all option normally.

Change-Id: I9e25421793879020ccc0695b9c2642f18fd5e8d2
Signed-off-by: hyuna0213.jo <hyuna0213.jo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/3811
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Jaehong Jo <jaehong.jo@samsung.com>
Reviewed-by: Jon A. Cruz <jonc@osg.samsung.com>