Applied fixes to enable Unicast discovery in the RI Layer's sample apps.

Applied fixes to enable Unicast discovery in the RI Layer's sample apps.

This fixes IOT-372 "Unicast Discovery over Wifi does not work."

Change-Id: Ifbc545f8a04049518410a4d9f54f692388921288
Signed-off-by: Joseph Morrow <joseph.l.morrow@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/452
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Doug Hudson <douglas.hudson@intel.com>
Reviewed-by: Ashok Babu Channa <ashok.channa@samsung.com>
Reviewed-by: Erich Keane <erich.keane@intel.com>