Minor improvements

- Fix typo
- Remove unnecessary warnings
    - Ignore dhcp config register/unregister event
    - Ignore interface IP update when there is no host discovered on that interface

Change-Id: I530fe36eb063ac8b3397c86e888c0a6c2ab8984b
diff --git a/apps/segmentrouting/app/src/main/java/org/onosproject/segmentrouting/HostHandler.java b/apps/segmentrouting/app/src/main/java/org/onosproject/segmentrouting/HostHandler.java
index e4efabb..5fdbf69 100644
--- a/apps/segmentrouting/app/src/main/java/org/onosproject/segmentrouting/HostHandler.java
+++ b/apps/segmentrouting/app/src/main/java/org/onosproject/segmentrouting/HostHandler.java
@@ -440,6 +440,7 @@
         Set<Host> hosts = hostService.getConnectedHosts(connectPoint);
 
         if (hosts == null || hosts.size() == 0) {
+            log.debug("processIntfVlanUpdatedEvent: No hosts connected to {}", connectPoint);
             return;
         }
 
@@ -472,7 +473,7 @@
         Set<Host> hosts = hostService.getConnectedHosts(cp);
 
         if (hosts == null || hosts.size() == 0) {
-            log.warn("processIntfIpUpdatedEvent: No hosts connected to {}", cp);
+            log.debug("processIntfIpUpdatedEvent: No hosts connected to {}", cp);
             return;
         }