Change hazelcast.xml default to tcp-ip + localhost

Hazelcast communication using multi-cast with default address may
interfere with other host who happens to be on the same network.
e.g.,When the code is checked-out and user immediately run mvn test, etc.

This is a short term workaround to address the issue by
changing the default to tcp-ip and forming cluster using localhost only.

Change-Id: I762edd6b37ccdb689c8b6493b60fdca7a8f1a0e1
diff --git a/conf/hazelcast.xml b/conf/hazelcast.xml
index cf44fc3..68575c6 100644
--- a/conf/hazelcast.xml
+++ b/conf/hazelcast.xml
@@ -91,19 +91,19 @@
   <network>
     <port auto-increment="true">5701</port>
     <join>
-      <multicast enabled="true">
-	<multicast-group>224.2.2.3</multicast-group>
-	<multicast-port>54327</multicast-port>
+      <multicast enabled="false">
+        <multicast-group>224.2.2.3</multicast-group>
+        <multicast-port>54327</multicast-port>
       </multicast>
-      <!--                                                                     
-      <tcp-ip enabled="false">                                                 
-        <member>machine1</member>                                              
-        <member>machine2</member>                                              
-        <member>machine3:5799</member>                                         
-        <member>192.168.1.0-7</member>                                         
-        <member>192.168.1.21</member>                                          
-      </tcp-ip>                                                                
+      <tcp-ip enabled="true">
+        <member>localhost</member>
+      <!--
+        <member>machine2</member>
+        <member>machine3:5799</member>
+        <member>192.168.1.0-7</member>
+        <member>192.168.1.21</member>
       -->
+      </tcp-ip>
       <aws enabled="false">
       </aws>
     </join>