Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 55f24c2f319cc56af574bd30b16632969e2cade2
  - Merge "Added null check to avoid crash at getErrorCode() call; fixed typos in error messages; removed unnecessary try...catch block"
  - Added null check to avoid crash at
    getErrorCode() call; fixed typos in error
    messages; removed unnecessary try...catch block

    Issue-ID: SO-1841
    Signed-off-by: Oleksandr Moliavko<o.moliavko@samsung.com>
    Change-Id: I95765a1a5a10497e366b5d94b89d45b6bde2b212