Fix logging to use library context

:Release Notes:
Fix logging functions to use PmLogLib library contexts.

:Detailed Notes:

:Testing Performed:
Unit-tests.

:QA Notes:

:Issues Addressed:
[BHV-3077] luna-service2: rework logging to use new pmloglib library-context feature

Open-webOS-DCO-1.0-Signed-off-by: Alexandr Smoktal <alexandr.smoktal@lge.com>

Change-Id: I3853485feee000b473d8efaa434820932e3684e7
Reviewed-on: https://g2g.palm.com/5135
Reviewed-by: DCO Verification
Reviewed-by: Alexandr Smoktal <alexandr.smoktal@lge.com>
Tested-by: Alexandr Smoktal <alexandr.smoktal@lge.com>
Reviewed-by: Sergiy Kryvonos <sergiy.kryvonos@lge.com>