Update git submodules

* Update docs/submodules/dmaap/messagerouter/messageservice.git from branch 'master'
  to 3884959f0bb9e6d0187606aa4342a80f366ca324
  - update MM agent API
    
    Issue-ID: DMAAP-909
    Change-Id: Icbc25d691f4078a24b407c33e1518e06b62141d4
    Signed-off-by: sunil.unnava <su622b@att.com>
    
1 file changed