fix wrong log level

Change-Id: Icd129e22e4acb41c5fd3d4829d9541bd6bdfcf80
diff --git a/openflow/ctl/src/main/java/org/onlab/onos/openflow/controller/impl/OpenFlowControllerImpl.java b/openflow/ctl/src/main/java/org/onlab/onos/openflow/controller/impl/OpenFlowControllerImpl.java
index cd9b760..9ef3077 100644
--- a/openflow/ctl/src/main/java/org/onlab/onos/openflow/controller/impl/OpenFlowControllerImpl.java
+++ b/openflow/ctl/src/main/java/org/onlab/onos/openflow/controller/impl/OpenFlowControllerImpl.java
@@ -207,7 +207,7 @@
                         + "value for dpid: {}", dpid);
                 return false;
             } else {
-                log.error("Added switch {}", dpid);
+                log.info("Added switch {}", dpid);
                 connectedSwitches.put(dpid, sw);
                 for (OpenFlowSwitchListener l : ofSwitchListener) {
                     l.switchAdded(dpid);