Correct submodule reference to plugins/replication

Idc0c29374 reverted the submodule reference to plugins/replication
for no apparent reason. Because of this, the submodule is always
reported as dirty by Git.

Change-Id: Ic511f3c165cec5cb41dcebb899f9c27a2eeb4dd0
diff --git a/plugins/replication b/plugins/replication
index d7c09fb..4689b41 160000
--- a/plugins/replication
+++ b/plugins/replication
@@ -1 +1 @@
-Subproject commit d7c09fbb4c18b1743d6060d361171c2a5237f22b
+Subproject commit 4689b419eab61ea204daf2dfca47296667ac317c