Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 76a37d03413fd1798e50274c57566c0ed3d752e4
  - AssignPnfBB connects PNF and service instance in AAI
    
    Change-Id: I92ab4b45acb120d647ea3de7a455e2e873c12a72
    Issue-ID: SO-2605
    Signed-off-by: Joanna Jeremicz <joanna.jeremicz@nokia.com>
    
1 file changed