Update git submodules

* Update docs/submodules/vnfsdk/model.git from branch 'master'
  to 776c60cca71b079af9da9eaf46baac9540ed91c4
  - Add VTP API def in swagger.json
    
    Issue-ID: VNFSDK-352
    
    Change-Id: I57e7d647ba17e627db61854d469c7ceda84e6c45
    Signed-off-by: kanagaraj Manickam k00365106 <kanagaraj.Manickam@huawei.com>
    
1 file changed