Update git submodules
Update git submodules

* Update plugins/replication from branch 'stable-2.16'
  to 8738fded0d6e0240e748b950a4a9b84ac8595896
  - Prevent persistent task listing interruptions on IOExceptions
    
    When iterating over the list of persisted tasks, it is possible for an
    IOException to occur while reading a specific task. Prevent this
    exception from breaking out of the iteration by catching and logging the
    exception inside the loop instead of outside of it.
    
    Also improve the logging by differentiating between failures that are
    severe versus potentially related to other node actions since in a
    multi-master scenario with shared storage, it is common for operations
    on one node to "interfere" with task listing operations on another node
    without causing a malfunction.  Specifically, improve the exception
    handling so that the logging in these latter cases have a likely
    explanation of the listing error, and do not consider these specific
    filesystem errors operational errors.
    
    Change-Id: Ia2ad431c20142ff0ce23dbace34aec837e3d8540
    
WANdisco/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,WANdisco/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit