Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to cfcb2684902aa01d60d1d7367da58813ac2151c0
  - Merge "Update Working with SO Docker Documentation"
  - Update Working with SO Docker Documentation
    
    patch description: Update Working with SO Docker
    documentation for casablanca release.
    
    Change-Id: If7a4601e83e0ca83f99a9f74e1f282abc3854bdd
    Issue-ID: SO-1505
    Signed-off-by: mohamed waly <mohamed.waly@orange.com>
    
1 file changed