Upgrade Atomix to Raft final version

Change-Id: I834a3db17bca69855901abb967218135d3547bee
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/RaftMessageContext.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/RaftMessageContext.java
index 6123d38..2aecd0b 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/RaftMessageContext.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/RaftMessageContext.java
@@ -36,6 +36,7 @@
     final MessageSubject pollSubject;
     final MessageSubject voteSubject;
     final MessageSubject appendSubject;
+    final MessageSubject transferSubject;
 
     RaftMessageContext(String prefix) {
         this.prefix = prefix;
@@ -53,6 +54,7 @@
         this.pollSubject = getSubject(prefix, "poll");
         this.voteSubject = getSubject(prefix, "vote");
         this.appendSubject = getSubject(prefix, "append");
+        this.transferSubject = getSubject(prefix, "transfer");
     }
 
     private static MessageSubject getSubject(String prefix, String type) {