Update git submodules

Update git submodules

* Update docs/submodules/vid.git from branch 'master'
  to 9e75a25d449679590b774b4bb078e1a57a2a39dc
  - Update aai schema to v19

    In order to use orchestration-type in "Browse SDC Service Models", newer schema version is needed.
    Moreover v19 is recomended versino in Frankfurt releas https://wiki.onap.org/display/DW/AAI+REST+API+Documentation+-+Frankfurt.

    Issue-ID: VID-602
    Signed-off-by: Bartosz Gardziejewski <bartosz.gardziejewski@nokia.com>
    Change-Id: Ib9bf098b19e62ed5868909c043cd7df0c1a4caf6