Update git submodules

* Update docs/submodules/dmaap/datarouter.git from branch 'master'
  to 0312e2224f81619699151718622b44db699bcce8
  - Merge "small, multi-platform docker images"
  - small, multi-platform docker images
    
    Issue-ID: INT-907
    Issue-ID: INT-908
    Issue-ID: INT-909
    
    Change-Id: I2df861f0098588ec9b394b501af2de6f7559c213
    Signed-off-by: sandovalfr <frank.sandoval@oamtechnologies.com>
    
1 file changed