Fix logging with correct json type

:Release Notes:
Json strings will be displayed correctly in log.

:Detailed Notes:
Use PMLOGJSON instead of PMLOGKS.

:Testing Performed:
tested on local build

:QA Notes:
test message:
luna-send -n 1 -a com.palm.configurator luna://com.palm.db/put '{"
objects": [{"_kind":"test.db", "data0":"value1"}]}'
should cause a log message:
user.warning mojodb-luna [] DB8 MOJ_SERVICE_WARNING {"sender":"com.palm.configurator",
"method":"put","payload":{"objects":[{"_kind":"test.db","data0":"value1"}]},
"error":"kind not registered: 'test.db'","reqErr":-3970}

:Issues Addressed:
[ANG-97] DB8 is logging with invalid json type

Open-webOS-DCO-1.0-Signed-off-by: Igor Kuksyuk <igor.kuksiuk@lge.com>

Change-Id: Ib316dbb46a830d37f00c25ba33566933ab7b02bc
Reviewed-on: https://g2g.palm.com/4398
Reviewed-by: DCO Verification
Reviewed-by: Oleksii Uratkin <oleksii.uratkin@lge.com>
Tested-by: Oleksii Uratkin <oleksii.uratkin@lge.com>