Added a skeletal structure for forwarding app.
diff --git a/core/trivial/src/main/java/org/onlab/onos/net/trivial/host/impl/SimpleHostManager.java b/core/trivial/src/main/java/org/onlab/onos/net/trivial/host/impl/SimpleHostManager.java
index 3032ac9..b42f1af 100644
--- a/core/trivial/src/main/java/org/onlab/onos/net/trivial/host/impl/SimpleHostManager.java
+++ b/core/trivial/src/main/java/org/onlab/onos/net/trivial/host/impl/SimpleHostManager.java
@@ -140,7 +140,7 @@
             HostEvent event = store.createOrUpdateHost(provider().id(), hostId,
                                                        hostDescription);
             if (event != null) {
-                log.info("Host {} detected", hostId);
+                log.debug("Host {} detected", hostId);
                 post(event);
             }
         }
@@ -151,7 +151,7 @@
             checkValidity();
             HostEvent event = store.removeHost(hostId);
             if (event != null) {
-                log.info("Host {} vanished", hostId);
+                log.debug("Host {} vanished", hostId);
                 post(event);
             }
         }