Update git submodules

* Update docs/submodules/externalapi/nbi.git from branch 'master'
  to 552ba2cc87a01ec0337e39ffcd819da5b6e05e62
  - Merge "Integrate sdc notification"
  - Integrate sdc notification
    
    -refactor code
    -beggining implementation
    
    Change-Id: I9f66d64d9a375ef96e0248f85e2c06828f1063eb
    Issue-ID: EXTAPI-158
    Signed-off-by: romaingimbert <romain.gimbert@orange.com>
    
1 file changed