[IOT-1434] fix subscribe presence for multicast.

[IOT-1434] fix subscribe presence for multicast.

it causes a big memory issue to add in serverRequestList.
because this request never remove

and subscribe presence for multicast should be not sent
on network.
since it is just for register clientCB in stack.

Change-Id: I14c9701009350ad52dfdf4e72db64522fc591705
Signed-off-by: jihwan.seo <jihwan.seo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/12941
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: JungYong KIM <jyong2.kim@samsung.com>
Reviewed-by: Ashok Babu Channa <ashok.channa@samsung.com>
(cherry picked from commit 45b9f4b4dade573f698f307c421c107d6190653f)
Reviewed-on: https://gerrit.iotivity.org/gerrit/13383