Update git submodules

* Update docs/submodules/aaf/certservice.git from branch 'master'
  to 88f5f147c47799078347c5dbbb94f35413fc47b6
  - Fix sonar issue
    
    Issue-ID: AAF-1118
    Signed-off-by: edyta <edyta.krukowska@nokia.com>
    Change-Id: I70590b305264ac5084cbf51f954db22da675f746
    
1 file changed