Update git submodules

* Update docs/submodules/dmaap/buscontroller.git from branch 'master'
  to 7e4724fa6bdf1d759eff9d5727addd5b59402c52
  - Remove apk upgrade
    
    Change-Id: If2a6f53c00597fc3076f2441a8708b768ee5b6f7
    Signed-off-by: dglFromAtt <dgl@research.att.com>
    Issue-ID: DMAAP-1120
    
1 file changed