Update git submodules

* Update docs/submodules/dmaap/buscontroller.git from branch 'master'
  to ab4d78a462a8110cae9278c13fbfccb3d34f208c
  - SPecify SNAPSHOT for artifact
    
    Signed-off-by: dglFromAtt <dgl@research.att.com>
    Issue-ID: DMAAP-1224
    Change-Id: I452aef9afbb793b5d210046ea001d8982467ba91
    
1 file changed