Host Location Provider improvements and logging

Change-Id: Ia8e5d7357ee6acb5c19925661778d1d24a0a5d14
diff --git a/providers/host/src/main/java/org/onosproject/provider/host/impl/HostLocationProvider.java b/providers/host/src/main/java/org/onosproject/provider/host/impl/HostLocationProvider.java
index a6b9bb0..089f173 100644
--- a/providers/host/src/main/java/org/onosproject/provider/host/impl/HostLocationProvider.java
+++ b/providers/host/src/main/java/org/onosproject/provider/host/impl/HostLocationProvider.java
@@ -472,6 +472,7 @@
         private void createOrUpdateHost(HostId hid, MacAddress mac, VlanId vlan,
                                         VlanId innerVlan, EthType outerTpid,
                                         HostLocation hloc, IpAddress ip) {
+            log.debug("Creating Host {} based on Location {}", hid, hloc);
             Set<HostLocation> newLocations = Sets.newHashSet(hloc);
 
             if (multihomingEnabled) {