Update git submodules

* Update docs/submodules/aaf/certservice.git from branch 'master'
  to 2639149f7f97ebf1c703b23d1aed17dad628bd64
  - Update CertService Usage Documentation
    
    Updated example deployment to include TLS changes
    
    Issue-ID: AAF-1091
    Signed-off-by: Adam Wudzinski <adam.wudzinski@nokia.com>
    Change-Id: I61bef9914f8e76e42fd65910edbb3cb9f42197dc
    
1 file changed