Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 3c68b089f1782befe61096549fa0916367751672
  - Merge "Added null checks for bp to prevent exceptions at bp.getId() calls; fixed omissions in methods control logic; removed unneeded catch blocks"
  - Added null checks for bp to prevent exceptions at
    bp.getId() calls; fixed omissions in methods
    control logic; removed unneeded catch blocks

    Issue-ID: SO-1841
    Signed-off-by: Oleksandr Moliavko <o.moliavko@samsung.com>
    Change-Id: I8347b953381ebb4a112a22fc8c58a9a32f2dbfb7