webos-image: db8=141
webos-image: db8=141

:Release Notes:
Add the tool helping to migrate from
multiple to a single LevelDB file,
fix free space calculation.

:Detailed Notes:
db8: submissions/140..submissions/141
fbdc3db Migration tool
b71f173 Revert "Migration tool"
509bdd9 Migration tool
92c4b8e Free space is miscalculated when starting db8

:Testing Performed:
BAT, unit tests.

:QA Notes:

:Issues Addressed:
[ANG-6239] Free space is miscalculated when starting db8
[BHV-7829] Migration tool approach №2
[BHV-9423] CCC: db8=141

Open-webOS-DCO-1.0-Signed-off-by: Oleg Yablokov <065a506e14c3b16be6add2f23b165d64f41a42d1@lge.com>

Change-Id: Ie32183d061314da125758a61c94d75a000e8a902
Reviewed-on: https://g2g.palm.com/5826
Reviewed-by: DCO Verification
Build: Oleg Yablokov <065a506e14c3b16be6add2f23b165d64f41a42d1@lge.com>
Reviewed-by: Oleg Yablokov <065a506e14c3b16be6add2f23b165d64f41a42d1@lge.com>
Reviewed-by: Build Verification
Tested-by: Olexandr Solomakha <f48805d19daf724f3e384fe2abc12accc388178f@lge.com>
Reviewed-by: Susan Montooth <be0b8b1fe2cc6a744be9b1ae6516e077aa323e09@lge.com>

Garfonso/meta-webos-ports,openwebos/meta-webos,Garfonso/meta-webos-ports,openwebos/meta-webos,nizovn/meta-webos-ports,nizovn/meta-webos-ports,openwebos/meta-webos,openwebos/meta-webos