Update git submodules

* Update docs/submodules/aai/aai-common.git from branch 'master'
  to 6915f57d07f466a6dd54be693b2af2cec9b8e0c1
  - AAI-common sonar fixes
    
    Issue-ID: AAI-2786
    Change-Id: Ia37e660886fce56c8ab5c53888fcbf265692a359
    Signed-off-by: David Brilla <david.brilla@tieto.com>
    
1 file changed