Update git submodules

* Update plugins/replication from branch 'master'
  to 99c9794a6d5d649bd60e1f0d8f59f79f929f7ba6
  - Merge "Move HttpClientProvider to the ReplicationModule"
  - Move HttpClientProvider to the ReplicationModule
    
    The HttpClientProvider was bound in each per-destination child injector.
    However, there is nothing destination specific in the
    HttpClientProvider, so move it to the parent injector.
    
    Change-Id: Ic89fabbcb1787896aff08035093a7f208eac88e1
    
diff --git a/plugins/replication b/plugins/replication
index 9d32843..99c9794 160000
--- a/plugins/replication
+++ b/plugins/replication
@@ -1 +1 @@
-Subproject commit 9d32843db89206fbd4c0b28073190afe1bed69dd
+Subproject commit 99c9794a6d5d649bd60e1f0d8f59f79f929f7ba6