soft-sensor-manager: Fixes cppcheck issue for arduino SampleApp

soft-sensor-manager: Fixes cppcheck issue for arduino SampleApp

This patch fixes the the below issue reported by cppcheck tool
in stack dir: "(error) Possible null pointer dereference:
entityHandlerRequest - otherwise it is redundant to check if
entityHandlerRequest is null at line 114"

Dereferencing of entityHandlerRequest->resJSONPayload is done if
flag includes OC_REQUEST_FLAG.

The patch also includes removal of some unnecessary blank lines

Change-Id: I8d9d7c40df5602b9d55de8d948871a2c485798a2
Signed-off-by: Ravi Nanjundappa <nravi.n@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/1510
Reviewed-by: Erich Keane <erich.keane@intel.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Minji Park <minjii.park@samsung.com>
Reviewed-by: Uze Choi <uzchoi@samsung.com>