Fix json for powerd request

:Release Notes:
Fixed wrong format in json param.

:Detailed Notes:
- replaced single quote with double quote in json encoded params

:Testing Performed:
Desktop build

:QA Notes:

:Issues Addressed:
[GF-52281] LunaSysService is logging error messages after system boot

Open-webOS-DCO-1.0-Signed-off-by: Nikolay Orliuk <nikolay.orliuk@lge.com>

Change-Id: I1b01becb3ad67c567f932c9acae432f79647e6db
Reviewed-on: https://g2g.palm.com/4142
Reviewed-by: DCO Verification
Reviewed-by: Anatolii Sakhnik <anatolii.sakhnik@lge.com>
Reviewed-by: Alekseyev Oleksandr <alekseyev.oleksandr@lge.com>
Reviewed-by: Nikolay Orliuk <nikolay.orliuk@lge.com>
Tested-by: Nikolay Orliuk <nikolay.orliuk@lge.com>