Update git submodules

* Update plugins/replication from branch 'stable-2.16'
  to 53e083fd0f17d1403b4d150e66655907c1ea139d
  - Merge "ReplicationTasksStorage: Add multi-primary unit tests" into stable-2.16
  - ReplicationTasksStorage: Add multi-primary unit tests
    
    These tests examine the replication scenarios under multi-primary
    setup making use of the api calls present in ReplicationTasksStorage
    class similarly as done in single primary setup.
    
    These tests ensure that the replication compatibility in multi-primary
    setup is not broken.
    
    Change-Id: I375b731829f3c0640d3a7a98635e1e5c526908ca
    
diff --git a/plugins/replication b/plugins/replication
index 4cb59f0..53e083f 160000
--- a/plugins/replication
+++ b/plugins/replication
@@ -1 +1 @@
-Subproject commit 4cb59f096b84f4369f62c8645db326c61826be79
+Subproject commit 53e083fd0f17d1403b4d150e66655907c1ea139d