Pass yajl's error description to callback

:Release Notes:
Pass error description from yajl parser into error callabck

:Detailed Notes:

:Testing Performed:
New unit test was written. All unit tests were passed successfully.
Tests were run with memory errors detection.

:QA Notes:

:Issues Addressed:
[GF-8625] Refine error messages when parsing JSON

Open-webOS-DCO-1.0-Signed-off-by: Alekseyev Oleksandr <alekseyev.oleksandr@lge.com>

Change-Id: I2ae5b4da4482c810482d839bbfa6ede8e0241d59
Reviewed-on: https://g2g.palm.com/3146
Reviewed-by: Build Verification
Reviewed-by: Alekseyev Oleksandr <alekseyev.oleksandr@lge.com>
Tested-by: Alekseyev Oleksandr <alekseyev.oleksandr@lge.com>
Reviewed-by: Anatolii Sakhnik <anatolii.sakhnik@lge.com>