Added JSON formatting for flow list command.
diff --git a/cli/src/main/java/org/onlab/onos/cli/net/FlowsListCommand.java b/cli/src/main/java/org/onlab/onos/cli/net/FlowsListCommand.java
index 9291212..39a8bc2 100644
--- a/cli/src/main/java/org/onlab/onos/cli/net/FlowsListCommand.java
+++ b/cli/src/main/java/org/onlab/onos/cli/net/FlowsListCommand.java
@@ -94,7 +94,7 @@
 
         result.put("device", device.id().toString())
                 .put("flowCount", flows.size())
-                .put("flows", array);
+                .set("flows", array);
         return result;
     }