Change: start-zk.conf and start-cassandra.sh copies config files in conf/{zoo.cfg, cassandra.yaml} to it's conf dir (instead of referring it)
diff --git a/start-cassandra.sh b/start-cassandra.sh
index ffc21e4..3bc62e4 100755
--- a/start-cassandra.sh
+++ b/start-cassandra.sh
@@ -30,6 +30,7 @@
 
   # Run cassandra 
   echo "Starting cassandra"
+  cp ${ONOS_HOME}/conf/cassandra.yaml $CASSANDRA_DIR/conf
   $CASSANDRA_DIR/bin/cassandra > $CASSANDRA_LOG 2>&1 
 }