Update git submodules

* Update docs/submodules/aaf/certservice.git from branch 'master'
  to ad63ce0e835ceb7509d398b91e5a9aca00987e64
  - Merge "Update CertService Installation Documentation"
  - Update CertService Installation Documentation
    
    Issue-ID: AAF-1091
    Signed-off-by: Adam Wudzinski <adam.wudzinski@nokia.com>
    Change-Id: Iefbdee500dd15183246004f8779ef25e3e9abe78
    
1 file changed