Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 3d55c357d5263c8b81e848b0c1efae777e3f7f9e
  - restoring the pnf dmaap client functionality to the proper working version
    
    Issue-ID: SO-2339
    Change-Id: I2a12517fd7b37d3260058be6c5c27865e207b861
    Signed-off-by: Lukasz Muszkieta <lukasz.muszkieta@nokia.com>
    
1 file changed