Bump replication plugin to 0af31d2 (master tip)

$ git log --oneline --no-merges 90c642...0af31d2
- 0af31d2 Fix PushOne toString() to show the right refs and hidden number

Release-Notes: Fixed replication refs display and hidden refs number
Change-Id: I602ce082292374d081ba5c5f611ca4aab300a244
diff --git a/plugins/replication b/plugins/replication
index 90c6420..0af31d2 160000
--- a/plugins/replication
+++ b/plugins/replication
@@ -1 +1 @@
-Subproject commit 90c64204e1e27ec245f41b3d08b10f431dd72faf
+Subproject commit 0af31d2a5df62329162a750beec2e9dc0adf8e72