Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to 4c9c4713cb184d4aa03beff8dcbf06881dc3d9e6
  - Update docs
    
    Signed-off-by: Yang Xu <yang.xu@futurewei.com>
    Issue-ID: INT-1109
    Change-Id: I69c90d8152f780e0e438236d3cec4a3ef0fead17
    
1 file changed