Update git submodules

* Update plugins/replication from branch 'stable-3.0'
  to 31a2fe27315c94f9b0b2d47f3dd2f6ea52790261
  - Trace details of the replication events cancelled
    
    When a destination is stopped, show in the replication_log
    the number of pending and in-flight events cancelled.
    
    The whole pending and in-flight cancellation is done through
    a stateLock critical region, so that the state of the
    destination object doesn't change in the middle of the
    operation.
    
    Change-Id: Ife2642bd4d1fd0ade627ace01b95bde6a9748d66
    
diff --git a/plugins/replication b/plugins/replication
index 12af752..31a2fe2 160000
--- a/plugins/replication
+++ b/plugins/replication
@@ -1 +1 @@
-Subproject commit 12af75284822e55ac8348925a09ea91a1489bcf2
+Subproject commit 31a2fe27315c94f9b0b2d47f3dd2f6ea52790261