Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 59700d14ff998413dada0cb2e0864e643edbb77e
  - Eliminated printStackTrace() calls

    Eliminated calls to printStackTrace() on Throwable as they go to stdout
    and are not handled by logger.
    Occurences has been replaced by calls to logger or modifications to
    nearby logger calls (Throwable passed as last parameter).

    Occurences in unit test classes left without modification.

    Change-Id: I6a771d60a3ea69ceecc29bb21358e565aa5ce101
    Issue-ID: LOG-631
    Signed-off-by: Witold Ficio Kopel <w.kopel@samsung.com>