Update plugins to latest revisions

Update the plugins to the latest revisions to get the
following changes:

replication:
- Minor improvements in the config documentation
- Replication settings auto-reload and restart

singleusergroup
- Remove pom.xml

Change-Id: Ie75091d9ced8962a30797a7ad8160454c8a3ab7c
diff --git a/plugins/replication b/plugins/replication
index 330228e..aa1ecbc 160000
--- a/plugins/replication
+++ b/plugins/replication
@@ -1 +1 @@
-Subproject commit 330228ed74629db4ed43e48d2d10925c0d7d2ff8
+Subproject commit aa1ecbc05debd07bc13c37dad1b9e645bf67e5ac
diff --git a/plugins/singleusergroup b/plugins/singleusergroup
index c9ad9d1..73c2381 160000
--- a/plugins/singleusergroup
+++ b/plugins/singleusergroup
@@ -1 +1 @@
-Subproject commit c9ad9d1be42d5139fc1c447df644866f1d23ed15
+Subproject commit 73c2381c5768f216b3a4abb1c623f8d0134a9600