Update git submodules
Update git submodules

* Update plugins/replication from branch 'master'
  - Merge branch 'stable-2.13'
    
    * stable-2.13:
      Make SearchingChangeCacheImpl nullable when replicating from slave
    
    Change-Id: I0d23a61100350239432d8eeb701483afe0625fb6
    
  - Make SearchingChangeCacheImpl nullable when replicating from slave
    
    SearchingChangeCacheImpl should be nullable in slave mode.
    
    Change-Id: If22407565f44e7ed201e57d7d3b7b9a51f20b5bc
    
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