Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to c1cd5ef428017bc26513395a3bfc00caf7209f8a
  - Fix sonar for MapEntry

    MapEntry bug: make entry private and provide accessors
    MapEntry codesmell: move comment 'Required by JAXB' into empty constructor
    MapElements codesmell: move explanatory comment inside empty constructor
    MapElements codesmell: log error stacktrace
    MapAdapter codesmell: use entry set instead of key set for iteration
    JAXBMarshallingTest: add test cases to cover 100% of MapElements & other cases

    Change-Id: If51f1f86b5ad44b3462424e4fd73cb0eff352124
    Issue-ID: SO-1811
    Signed-off-by: k.kazak <k.kazak@samsung.com>