Update replication plugin to latest revision

This updates the replication plugin to the latest revision
on the stable-2.8 branch, and adds the following change:

- Fix invalid syntax in SSH config file example

Change-Id: I79ac7cc93f14d9ca0dc6937f8e8cec6301301da2
diff --git a/plugins/replication b/plugins/replication
index 68ab447..fa66d17 160000
--- a/plugins/replication
+++ b/plugins/replication
@@ -1 +1 @@
-Subproject commit 68ab44794695bf5f7faec3bcae27bce42052a68b
+Subproject commit fa66d17b1d6ed3266d0e9061a852fc530ec2ea73