Update git submodules

* Update docs/submodules/aaf/certservice.git from branch 'master'
  to b81c681cb6be761a2abb5e2f5af1b923bef1f6b4
  - Switch client and server to communicate over TLS
    
    Issue-ID: AAF-1084
    Signed-off-by: Adam WudziƄski <adam.wudzinski@nokia.com>
    Change-Id: I7f11b27c7dcdf4fc3eba2d5e64b6dc775c80dd74
    
1 file changed