webos-image: libpbnjson=36,v2.8.0

:Release Notes:
fix local URI resolution, fix the bug caused a schema id
collision, provide mechanism to add default values to jvalue

:Detailed Notes:
submissions/35..submissions/36
ed5a782 Version bump to 2.8.0
b10a7d3 Fix local URI resolution
5c3db70 drop fragments stack
bf922af fix bug caused a schema id collision
6f703a1 Provide mechanism to add default values to jvalue

:Testing Performed:
unit tests, build

:QA Notes:

:Issues Addressed:
[BHV-8631] libpbnjson: fix 'oneOf' behaviour for fragments without id's
[BHV-1568] [api] Fix local URI resolution
[BHV-3142] Provide possibility to fill-up default values in jvalue according to schema
[BHV-9497] CCC: libpbnjson=36,v2.8.0

Open-webOS-DCO-1.0-Signed-off-by: Andrii Zora <andrii.zora@lge.com>

Change-Id: I6e9aa532c6aab02ea2ecee7b7b014a1cd1ce445f
Reviewed-on: https://g2g.palm.com/5859
Reviewed-by: DCO Verification
Build: Andrii Zora <andrii.zora@lge.com>
Reviewed-by: Andrii Zora <andrii.zora@lge.com>
Reviewed-by: Build Verification
Tested-by: Andrii Zora <andrii.zora@lge.com>
Reviewed-by: Anatolii Sakhnik <anatolii.sakhnik@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>