Fixing Klocwork reported error in secure sample apps

Fixing Klocwork reported error in secure sample apps

Recently OCDoResource API was updated to take a NULL handle.
Updated sample apps to pass a NULL handle. This will stop
Klocwork on generating false positives.

Change-Id: I35f81cdde155a4118578ea86a35a981038c22f2e
Signed-off-by: Sachin Agrawal <sachin.agrawal@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/421
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Erich Keane <erich.keane@intel.com>
Reviewed-by: Sakthivel Samidurai <sakthivel.samidurai@intel.com>
Reviewed-by: Sudarshan Prasad <sudarshan.prasad@intel.com>