Update git submodules
Update git submodules

* Update plugins/replication from branch 'master'
  to 46cfb7dd5b6891f991cfe66e72c08953487c1c81
  - Inherit remote replication events from a common parent
    
    The replication plugin models replication events that are directed to a
    specific remote.
    
    These are:
    
    RefReplicatedEvent and ReplicationScheduledEvent
    
    These events share many fields (such as project, ref, target) and this
    makes sense, as they all represent the status of a ref replication to a
    particular remote.
    
    However, rather than inheriting from a common parent, most fields are
    copy & pasted redundantly into each event.
    
    Extract common fields by having RefReplicatedEvent and
    ReplicationScheduledEvent inherit from a common parent.
    
    This also opens the door for other ref-replication-based events (such as
    pull-replication for example) to adhere to the same interface.
    
    Bug: Issue 14819
    Change-Id: I29da700bf6671159bd6ae29b00ef6b962ef0fcb5
    
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