Update git submodules

* Update plugins/replication from branch 'master'
  - 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 305c864..7bdacab 160000
--- a/plugins/replication
+++ b/plugins/replication
@@ -1 +1 @@
-Subproject commit 305c864db28eb0c77c8499bc04c87de3f849cf3c
+Subproject commit 7bdacabfcc4c9b17b773f2783bf406c02ad738fb