Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to 57a161d8f533d30a1d27cf72856fe8274aea7aca
  - Add MDONS sections
    
    Issue-ID: INT-1474
    Signed-off-by: Xin Miao <xin.miao@us.fujitsu.com>
    Change-Id: I57483601ac9962c486657c7c0941cfe7faf3a222
    
1 file changed