Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to 8028905644ea2dcf71ab2703c571398a19503c67
  - Update validation docker image version
    
    Pomba uses validation 1.3.1 to work with data-router
    
    Change-Id: Ie63889e65b0827ddc8df1ac274d4a1aacebf250a
    Issue-ID: INT-943
    Signed-off-by: Yang Xu <yang.xu3@huawei.com>
    
1 file changed