[ONOS-7801] Avoid converting local node on every lookup in ClusterStore

Change-Id: I60cdfba80796fc7210ab96798086e42e1d3d2e94
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/atomix/cluster/impl/AtomixClusterStore.java b/core/store/primitives/src/main/java/org/onosproject/store/atomix/cluster/impl/AtomixClusterStore.java
index a1b7f16..618c631 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/atomix/cluster/impl/AtomixClusterStore.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/atomix/cluster/impl/AtomixClusterStore.java
@@ -159,13 +159,13 @@
     private ControllerNode toControllerNode(Member member) {
         return new DefaultControllerNode(
             NodeId.nodeId(member.id().id()),
-            IpAddress.valueOf(member.address().address()),
+            member.address().host(),
             member.address().port());
     }
 
     @Override
     public ControllerNode getLocalNode() {
-        return toControllerNode(membershipService.getLocalMember());
+        return localNode;
     }
 
     @Override