Unify HazelcastInstance creation.

Change-Id: Ia54523b57a33329cbf883a98e912ccc1b50c02b1
diff --git a/src/main/java/net/onrc/onos/core/datagrid/HazelcastCLI.java b/src/main/java/net/onrc/onos/core/datagrid/HazelcastCLI.java
index 1ed4d75..6948ee1 100644
--- a/src/main/java/net/onrc/onos/core/datagrid/HazelcastCLI.java
+++ b/src/main/java/net/onrc/onos/core/datagrid/HazelcastCLI.java
@@ -38,7 +38,7 @@
             config.addExecutorConfig(new ExecutorConfig("e" + k).setPoolSize(k));
         }
 
-        HazelcastCLI cli = new HazelcastCLI(Hazelcast.newHazelcastInstance(config));
+        HazelcastCLI cli = new HazelcastCLI(Hazelcast.getOrCreateHazelcastInstance(config));
         cli.start(args);
     }