Update git submodules
Update git submodules

* Update plugins/replication from branch 'master'
  - Extract ssh related code into SshHelper class
    
    Move ssh related code out from ReplicationQueue into separate class
    SshHelper. Later on the same code could be used to interact with other
    git server that does not support shell access, but allow to execute
    build in commands (like eg. Gerrit does).
    
    Change-Id: I07c142a58571f71bf8765d956c6050b36d2e44fc
    
GerritCodeReview/gerrit,qtproject/qtqa-gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,gerrit-review/gerrit,qtproject/qtqa-gerrit,qtproject/qtqa-gerrit,qtproject/qtqa-gerrit,qtproject/qtqa-gerrit,WANdisco/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,qtproject/qtqa-gerrit,gerrit-review/gerrit,WANdisco/gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit