Update git submodules

* Update docs/submodules/sdnc/oam.git from branch 'master'
  to 84477fc8f92e417f809ffe040ffb12de46a43a77
  - DGs for SOTN NNI based service creation
    
    Issue-ID: SDNC-900
    Signed-off-by: Hesam Rahimi <hesam.rahimi@huawei.com>
    Change-Id: I3ae8efc39aaa5fc5de48b3323f986531d3c7fa74
    
1 file changed