fix dir setting (use relative path from /home/openflow) in func.sh
diff --git a/cluster-mgmt/bin/func.sh b/cluster-mgmt/bin/func.sh
index b6f4c1e..e3a5b68 100755
--- a/cluster-mgmt/bin/func.sh
+++ b/cluster-mgmt/bin/func.sh
@@ -1,7 +1,6 @@
-USERNAME=ubuntu
-CASSANDRA_DIR='/home/ubuntu/apache-cassandra-1.1.4'
-ZK_DIR='/home/ubuntu/zookeeper-3.4.5'
-ONOS_DIR='/home/ubuntu/ONOS'
+CASSANDRA_DIR='${HOME}/apache-cassandra-1.1.4'
+ZK_DIR='${HOME}/zookeeper-3.4.5'
+ONOS_DIR='${HOME}/ONOS'
 ZK_LIB='/var/lib/zookeeper'
 CASSANDRA_LIB='/var/lib/cassandra'