Update git submodules
Update git submodules

* Update plugins/replication from branch 'stable-2.14'
  to 19c302973e255e2f5e733acf72591fcbc3d805b6
  - Fix creating missing repository
    
    When replicating to a destination where the repository does not exist,
    updating the HEAD reference failed because the passed reference name was
    not absolute. When this happened, an unchecked exception was triggered
    but never showed in the logs. In fact, the replication logs were showing
    only the message announcing the replication started, but no additional
    information about the success or failure of the operation was displayed.
    
    Avoid this by resolving symbolic references and checking the reference
    is absolute before trying to update the HEAD in the new repository.
    
    Change-Id: I18295a37a04413ba64bf7e9ee31640ee23c4c1e0
    
WANdisco/gerrit,WANdisco/gerrit,qtproject/qtqa-gerrit,qtproject/qtqa-gerrit,WANdisco/gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,WANdisco/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit