Fix Presence notification issues.
* Handle duplicate stop notification on the client side.
* Once StopPresence is called on the server, no more notifications are sent. Fixes IOT-66.
* Correct implementation for sending the presence notification when unbinding.
Change-Id: I112a1ef2cb5c04d847c0c83f5309d67acdc4c1fb
Signed-off-by: Sashi Penta <sashi.kumar.penta@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/402
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Patrick Lankswert <patrick.lankswert@intel.com>