Update git submodules
Update git submodules

* Update plugins/replication from branch 'stable-2.16'
  to a46a886822c8fab3cbcbbabbff250ba69f640563
  - Improve project creation replication integration test
    
    Make sure project creation is correctly managed
    and tested, asserting that the repository contains at least one
    ref replicated and not just the bare repo showing up.
    
    Change-Id: I0fdc1e73390c2abd3e40d2a02fd7e4ce7f20bb67
    
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