Configurable clustername

- Configurable clustername for ZooKeeper, Hazelcast, RAMCloud

Change-Id: I2862c7667ece21733f95b25fad3840777314170d
diff --git a/conf/hazelcast.default.xml b/conf/hazelcast.default.xml
index b61fc9f..a65edce 100644
--- a/conf/hazelcast.default.xml
+++ b/conf/hazelcast.default.xml
@@ -3,6 +3,10 @@
 	xmlns="http://www.hazelcast.com/schema/config"
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
 
+  <group>
+    <name>onos</name>
+  </group>
+
   <properties>
     <property name="hazelcast.logging.type">slf4j</property>
     <property name="hazelcast.version.check.enabled">false</property>