webos-image: db8=123, v 3.2.0

:Release Notes:
Add test for testing db8 when no free space available
on device
Fix memory leaks
Fix quota and space calculations
Fix fatal errors due to fill up the partition

:Detailed Notes:
submissions/121..submissions/123
796fff9 Fix up spam test
cfea5fe Fix memory leak
25000ff Test db8 when no left free space on device
22130c2 Two bugs when scheduled space check
17a9932 Return correct reason of error in leveldb engine
c040f49 A problem of miscalculated in doSpaceCheck

:Testing Performed:
MiniBAT ANG-1412

:QA Notes:

:Issues Addressed:
[ANG-1412] CCC: db8=123, v 3.2.0
[ANG-1408] Spam test not compilable
[ANG-616]  DB8 Memory leakage on MojDbServiceHandlerInternal::subscribe()
[ANG-260]  [DB8] Add test of db8 behaviour, when no free space left on device
[GF-59798] [DB8] Two bugs when scheduled space check
[GF-59633] [DB8] "Fatal Error" occurs and db8 process killed when partition is full
[ANG-811]  [DB] a problem of miscalculated in doSpaceCheck

Open-webOS-DCO-1.0-Signed-off-by: Oleksii Uratkin <oleksii.uratkin@lge.com>

Change-Id: Icb851ef13f1c18643f26b2f3e7a58191ebb267dc
Reviewed-on: https://g2g.palm.com/4651
Reviewed-by: DCO Verification
Build: Maksym Sditanov <maxim.sditanov@lge.com>
Reviewed-by: Build Verification
Reviewed-by: Maksym Sditanov <maxim.sditanov@lge.com>
Tested-by: Maksym Sditanov <maxim.sditanov@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>