Update git submodules
Update git submodules

* Update plugins/replication from branch 'stable-3.1'
  to 27ad28ab03c5f8f0c23b7527afda0f6378beb447
  - Add multiple replication configuration file support
    
    Replication plugin is capable to load both replication.config file and
    all *.config files from etc/replication directory. This change allows
    to split current monolith replication.config into global and remotes
    parts. Main purpose of this change is to simplify future generation
    of the diff between old and new remote configurations to decide which
    remote configurations needs to be reloaded.
    
    Feature: Issue 12450
    Change-Id: I51c1b8fc3b7d95b65b15c37a540fdc6e2087d09c
    
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