Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 3a28b9af8d08fc2cf8d9af9b38578fd034999dc2
  - Remove powermock from ValidationConfigManagerTest
    
    - Remove powermock reference from ValidationConfigManagerTest
    
    Issue-ID: SDC-3064
    Signed-off-by: Rodrigo Lima  <rodrigo.lima@yoppworks.com>
    Change-Id: Ib330b0fcaf132e5d67f65b482a80b5b75f8c336b
    
1 file changed