Update git submodules

* Update docs/submodules/dcaegen2.git from branch 'master'
  to 99e9e486e0c61c29a9dd60c490d530c4a2a9cd7e
  - Update swagger files in rst documentation
    
    Issue-ID: DCAEGEN2-2114
    Signed-off-by: Bartosz Gardziejewski <bartosz.gardziejewski@nokia.com>
    Change-Id: I3af88cf37b118067a4570080c71a6fe7762c46c7
    
1 file changed