Update git submodules

* Update docs/submodules/dmaap/messagerouter/messageservice.git from branch 'master'
  to a81e4e55161822cf42caf6547127ce13fe743aea
  - fix for security vulnerabilities
    Issue-ID: DMAAP-895
    Change-Id: I4532ba8ecfe745c1689d72d6423ebaa0d355e267
    Signed-off-by: su622b <su622b@att.com>
    
1 file changed