webos-image: db8=140

:Release Notes:
Add singleleveldb support into DB8
Remove unrequired subsriptions
Add dependency from leveldb_tl library

:Detailed Notes:
submissions/139..submissions/140
85b2e56 Remove old MediaHandler API
240a6e5 Singledb support

:Testing Performed:
MiniBAT, DB8 unit tests

:QA Notes:

:Issues Addressed:
[BHV-8154] CCC: db8=140

Open-webOS-DCO-1.0-Signed-off-by: Maksym Sditanov <maxim.sditanov@lge.com>

Change-Id: I880619d8a98f779b539c323fdab86c0204fcdfe6
Reviewed-on: https://g2g.palm.com/5691
Reviewed-by: DCO Verification
Reviewed-by: Maksym Sditanov <maxim.sditanov@lge.com>
Tested-by: Maksym Sditanov <maxim.sditanov@lge.com>
Reviewed-by: Martin Jansa <Martin.Jansa@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>