Update git submodules
Update git submodules

* Update plugins/replication from branch 'stable-2.16'
  to 60f470c96232d44c5fd83c75ac99174b356adcf5
  - Persist replication task when pushing all refs
    
    Create a replication event associated with the replication of all
    refs, so that the completion of the operation would find a corresponding
    task and will not throw an exception.
    
    Another benefit also is the ability to replay pending replication
    events for a push of all refs upon plugin restarts and configuration
    reloads.
    
    Bug: Issue 11424
    Change-Id: I63a82ff128c98e0ab7e58b76fa8f8548eb74e915
    
GerritCodeReview/gerrit,qtproject/qtqa-gerrit,qtproject/qtqa-gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,WANdisco/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,qtproject/qtqa-gerrit,qtproject/qtqa-gerrit,qtproject/qtqa-gerrit