[IOT-1832] Restore error code

[IOT-1832] Restore error code

Restore the error code expected by the unit test, recently
modified by change df063552a4dfab53662653566fe73ed491820aaf.

Change-Id: If5393030a4019485aad5dc0c13159b5b895dc2f8
Signed-off-by: Dan Mihai <Daniel.Mihai@microsoft.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/17385
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Kevin Kane <kkane@microsoft.com>
Reviewed-by: Nathan Heldt-Sheller <nathan.heldt-sheller@intel.com>
Reviewed-by: Mike Fenelon <mike.fenelon@microsoft.com>