Lowering log level

Change-Id: I4766f2495d24f477913a7aea8ca70ef4d7c7a633
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/UiTopoSession.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/UiTopoSession.java
index 0ffe2ca..a693565 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/topo/UiTopoSession.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/UiTopoSession.java
@@ -99,7 +99,7 @@
 
     @Override
     public void event(UiModelEvent event) {
-        log.info("Event received: {}", event);
+        log.debug("Event received: {}", event);
         // TODO: handle model events from the cache...
     }