Update git submodules
Update git submodules

* Update plugins/replication from branch 'stable-3.1'
  to 22ca0b406a4efb9aebbbfcac8d2d986812423f01
  - Split integration tests to different targets
    
    Running all integration tests as part of one single 'replication_it'
    target does not cope well with the addition of extra tests, because it
    is bound to take longer and longer, eventually hitting any test timeout
    threshold.
    
    Splitting integration tests into different targets avoids timeout
    failures and also provides additional benefits, such as:
    
    - Better understanding of test failures
    - More efficient utilization of bazel build outputs and remote caching,
      effectively making tests execution faster.
    
    Bug: Issue 13909
    Change-Id: Ifc6cce9996d3a8a23ec2a66c377978205fb6680f
    
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