javadoc fixes

Change-Id: I3b4fc2d99f42b2413a535fb411b9c19bdd186ad8
diff --git a/openflow/api/src/main/java/org/onlab/onos/openflow/controller/OpenFlowSwitch.java b/openflow/api/src/main/java/org/onlab/onos/openflow/controller/OpenFlowSwitch.java
index 2d3f890..bd90241 100644
--- a/openflow/api/src/main/java/org/onlab/onos/openflow/controller/OpenFlowSwitch.java
+++ b/openflow/api/src/main/java/org/onlab/onos/openflow/controller/OpenFlowSwitch.java
@@ -133,7 +133,7 @@
      * @param requested the role requested by the controller
      * @param response the role set at the device
      */
-    public void returnRoleReply(RoleState requested, RoleState reponse);
+    public void returnRoleReply(RoleState requested, RoleState response);
 
     /**
      * Indicates if this switch is optical.