Update git submodules

* Update plugins/replication from branch 'stable-2.14'
  - Merge branch 'stable-2.13' into stable-2.14
    
    * stable-2.13:
      Fix minor nits in documentation of replication.maxRetries
      Fix replication retries when maxRetries is set to 0
      Set max retries to avoid queue congestion
    
    Change-Id: Icf972f3df7d3d59925db670bc1f033028306d0c1
    
  - Fix minor nits in documentation of replication.maxRetries
    
    Change-Id: I80e46269e12b9e7a429634dd90ce52e90cc6ad79
    
  - Fix replication retries when maxRetries is set to 0
    
    maxRetries defaults to 0 which means retry indefinitely but it was not
    retrying.
    
    Change-Id: I6c8d8d6b1511d67b647f25193dcfe860687eea76
    
  - Set max retries to avoid queue congestion
    
    When servers have *a lot* of remote slaves, some of them
    unstable and potentially offline, a maximum retry policy is
    needed to prevent push events to stay in the replication queue
    and getting rescheduled forever.
    
    Keep backward-compatible configuration by setting maxRetry
    by default to zero, which means disabled.
    
    Change-Id: I060cc7bc3a4d1089b0815db02d2e1430f83a2015
    
diff --git a/plugins/replication b/plugins/replication
index f88c39a..ff270c1 160000
--- a/plugins/replication
+++ b/plugins/replication
@@ -1 +1 @@
-Subproject commit f88c39a52c45933f0196b94e570904383aa865ec
+Subproject commit ff270c13e4fcc1c5ad435c712e6b20b6a2956362