Update git submodules

* Update docs/submodules/vnfsdk/model.git from branch 'master'
  to 4fd0e98f62594198ba240265634a3302c3d257ef
  - Document OJSI-88 (CVE-2019-12126) vulnerability
    
    Issue-ID: OJSI-88
    Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
    Change-Id: Id2086207baf3ff3426fca92295bdf30b5efa4b73
    
1 file changed