Update git submodules
Update git submodules

* Update plugins/replication from branch 'stable-2.15'
  to 3248582915e897c0d568160465a2ca905f38df3e
  - Fix issue with dropping events on start
    
    During the configuration reload ReplicationQueue dropped reference
    updated events. Because replication scheduling is not created and
    events are not preserved replication for these events never happened.
    
    Solution is to add in memory queue which holds events until plugin
    is up and running and then fire those events to make sure that all
    replication happened.
    
    Bug: Issue 11573
    Change-Id: I3f9767c3879152acc8ff4ab73233abb278fb07a7
    
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