Update git submodules

* Update docs/submodules/dmaap/messagerouter/messageservice.git from branch 'master'
  to 681bcde4445437de3b0d826c3e8e4af6231a174b
  - add ElAlto Release notes
    
    Issue-ID: DMAAP-1305
    Change-Id: I2770e1efce4e077d5e365243e8bfe735a09b5646
    Signed-off-by: su622b <su622b@att.com>
    
1 file changed