Update git submodules

* Update plugins/replication from branch 'master'
  to 864c077e5e13ebbae5e7d0a3abc95fc8ae3fdc8b
  - Reduce scope of json variable
    
    Previously this was used to create the sha1 for the filesystem key, but
    since that is no longer the case, it is not needed in the contructor and
    the scope can be reduced.
    
    Change-Id: Ib3baebac97c8f11bd2f08edd62602ddb3ec47a83
    
diff --git a/plugins/replication b/plugins/replication
index e3cc87b..864c077 160000
--- a/plugins/replication
+++ b/plugins/replication
@@ -1 +1 @@
-Subproject commit e3cc87b88c6a64966a411b8a0a4caad3ebad539b
+Subproject commit 864c077e5e13ebbae5e7d0a3abc95fc8ae3fdc8b