Update git submodules

* Update plugins/replication from branch 'stable-2.15'
  to a62c3c331e11d6477d04b6b3079346f0ea2bcd8f
  - Merge branch 'stable-2.14' into stable-2.15
    
    * stable-2.14:
      StartCommand: Reformat with google-java-format 1.6
    
    Change-Id: If85bd54040a37946cbe5aa69a80e43e5feaa6d6c
    
  - StartCommand: Reformat with google-java-format 1.6
    
    Change-Id: I3c3420f9951b8060273d88e5bf2bcacce8266ab6
    

* Update plugins/singleusergroup from branch 'stable-2.15'
  to 578bc671ec38eba7c2aab38644fd1c4deacad4dd
  - SingleUserGroupTest: Reformat with google-java-format 1.6
    
    Change-Id: Ief2cf8b9370ea5a2b4cc3e578aa2491ac5ac7ace
    

plugins/replication

diff --git a/plugins/replication b/plugins/replication
index e6092a0..a62c3c3 160000
--- a/plugins/replication
+++ b/plugins/replication
@@ -1 +1 @@
-Subproject commit e6092a02c3e65130b596ede26a4038c83314bafc
+Subproject commit a62c3c331e11d6477d04b6b3079346f0ea2bcd8f

plugins/singleusergroup

diff --git a/plugins/singleusergroup b/plugins/singleusergroup
index 94e9edb..578bc67 160000
--- a/plugins/singleusergroup
+++ b/plugins/singleusergroup
@@ -1 +1 @@
-Subproject commit 94e9edbba44b5e8c42e7764af924d3ea20835bf2
+Subproject commit 578bc671ec38eba7c2aab38644fd1c4deacad4dd