Update git submodules
Update git submodules

* Update plugins/replication from branch 'stable-2.16'
  to 22ef9a9634008dfc09ea4dae6f17d99aa4dbbb81
  - Clarify that starred-changes ref is not needed on slaves
    
    When using the replication plugin to push to a Gerrit slave
    or to a standard Git repository, refs/starred-changes/* is not
    needed in the replication.config.
    
    Change-Id: Ia77da5a0a8b0247470507bf28680117801c441d3
    
GerritCodeReview/gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,WANdisco/gerrit,WANdisco/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,qtproject/qtqa-gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit