minor cosmetic changes to cluster configuration xml schema

git-svn-id: https://asterixdb.googlecode.com/svn/branches/asterix_stabilization_ioc@1371 eaa15691-b419-025a-1212-ee371bd00084
diff --git a/asterix-installer/src/main/resources/clusters/local/local.xml b/asterix-installer/src/main/resources/clusters/local/local.xml
index 1413999..7a8e78f 100644
--- a/asterix-installer/src/main/resources/clusters/local/local.xml
+++ b/asterix-installer/src/main/resources/clusters/local/local.xml
@@ -7,7 +7,7 @@
   <logdir>/tmp/asterix/logs</logdir>
   <store>/tmp/asterix/storage</store>
   <java_home></java_home>
-  <ram>1024m</ram>
+  <java_heap>1024m</java_heap>
   <master-node>
      <id>master</id>
      <ip>127.0.0.1</ip>