Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to fb37bbac02e3e404e61fbae88c17d91a8172d874
  - Merge "Validate inputs for pnf association"
  - Validate inputs for pnf association
    
    Issue-ID: SO-1274
    Change-Id: I3fdb66ef4bd259bef46c6f092d7d142b6cb5d9dc
    Signed-off-by: Joanna Jeremicz <joanna.jeremicz@nokia.com>
    
1 file changed