Update git submodules

* Update docs/submodules/dmaap/buscontroller.git from branch 'elalto'
  to 0251174c5073fe74be42b5b33f1ff33fa98d3721
  - update release notes
    
    Issue-ID: DMAAP-1308
    Signed-off-by: dglFromAtt <dgl@research.att.com>
    Change-Id: I7e32c9e8cf1b3a655c0fe72e907e2ae0b4a12aef
    Signed-off-by: dglFromAtt <dgl@research.att.com>
    (cherry picked from commit 2d14d6dff3456430022efe6cf3607c9f8794a297)
    
1 file changed