Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to afb9786b012d43bef177e659e6f37c8017f2642c
  - Disable cassandra cluster in integration override
    
    Change-Id: I14f2c5ae49395b46d8fd7a5731928d8f23d18adb
    Issue-ID: INT-994
    Signed-off-by: Yang Xu <yang.xu3@huawei.com>
    
1 file changed