Update git submodules
Update git submodules

* Update plugins/replication from branch 'stable-2.15'
  to 7f94fed1b567713a629f7621ff2c511767e448ab
  - SshHelper: Add class javadoc
    
    Change-Id: I80ab0c2225ad02628b630889c299c474e0087d70
    
  - Make more classes and fields public to ease extensibility
    
    Make classes public, and their constructors protected, to allow
    them to be extended.
    
    Make event type names and fields public.
    
    Change-Id: Iba275f99b7afbf87d57dd44851d043ad0f23fbe1
    
qtproject/qtqa-gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,WANdisco/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,qtproject/qtqa-gerrit,WANdisco/gerrit,WANdisco/gerrit,WANdisco/gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit