Update git submodules
Update git submodules

* Update plugins/replication from branch 'stable-3.0'
  to 51cd1e7b7b2a4c7f7778d49d64b70e2f617ca714
  - Cancel auto-reload runnable at configuration shutdown
    
    Avoid having multiple auto-reload runnable when
    the configuration is shut down and restarted.
    The situation happens quite often when the configuration
    is reloaded and generates unnecessary extra concurrency
    on the configuration objects other than increasingly consuming
    additional tasks.
    
    Bug: Issue 11187
    Change-Id: Ic03ce3fceb0df746d20437ae7cf4d2a8f4822d02
    
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