Upgrade to Atomix 3.0-rc5
* Upgrade Raft primitives to Atomix 3.0
* Replace cluster store and messaging implementations with Atomix cluster management/messaging
* Add test scripts for installing/starting Atomix cluster
* Replace core primitives with Atomix primitives.

Change-Id: I7623653c81292a34f21b01f5f38ca11b5ef15cad
diff --git a/core/api/src/main/java/org/onosproject/cluster/ClusterService.java b/core/api/src/main/java/org/onosproject/cluster/ClusterService.java
index 54f23cd..69ceb64 100644
--- a/core/api/src/main/java/org/onosproject/cluster/ClusterService.java
+++ b/core/api/src/main/java/org/onosproject/cluster/ClusterService.java
@@ -44,6 +44,13 @@
     Set<ControllerNode> getNodes();
 
     /**
+     * Returns the set of consensus nodes.
+     *
+     * @return the set of consensus nodes
+     */
+    Set<Node> getConsensusNodes();
+
+    /**
      * Returns the specified controller node.
      *
      * @param nodeId controller node identifier