oic/d piid issue with notification

[bjornAndreassen]

Since a few weeks its been possible to observe the oic/d resource. Changing the n parameter (name) on the oc/con resource will automaticaly change the n parameter on the oic/d resource. This will then trigger a notification to be sent to any observers of this resource. This works.

However, in the request callback for that resource (oc_core_device_handler() in https://github.com/iotivity/iotivity-lite/blob/master/api/oc_core_res.c) the piid resource has a condition on it.

if (request->origin && request->origin->version != OIC_VER_1_1_0) {
oc_rep_set_text_string(root, piid, piid);
}

This works fine when a client does a get on this resource, but when this is used for the notification scenario above the request->origin is not set and the piid will be ommited from the notification.

This will then look from a clients perspective as: Chainging the n parameter on oc/con deletes the piid on oic/d.