Update git submodules

* Update docs/submodules/vid.git from branch 'master'
  to b491faf8b57779addeb41def6be4c8977d0d5acd
  - Merge "Pnf pojo improvements"
  - Pnf pojo improvements
    
    - added builder
    - immutable
    - improved json serialization
    
    Change-Id: If0c9128dfd27d1c04e2f8683bade16700789276e
    Issue-ID: VID-478
    Signed-off-by: Michal Kabaj <michal.kabaj@nokia.com>
    
1 file changed