Fixed equals methods for better efficiency.
Cleaned up ClusterService API.
diff --git a/core/api/src/main/java/org/onlab/onos/net/DefaultHost.java b/core/api/src/main/java/org/onlab/onos/net/DefaultHost.java
index fad9147..8a2d6e6 100644
--- a/core/api/src/main/java/org/onlab/onos/net/DefaultHost.java
+++ b/core/api/src/main/java/org/onlab/onos/net/DefaultHost.java
@@ -63,6 +63,9 @@
 
     @Override
     public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
         if (obj instanceof DefaultHost) {
             final DefaultHost other = (DefaultHost) obj;
             return Objects.equals(this.id, other.id) &&