Fix: resolve a NPE caused by configmap watcher

1. lower down the watcher onClose exception log
2. correct watcher documents of service and configmap

Change-Id: I85cedf5ec5e0939b64bea6716221eed58349ace6
diff --git a/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/KubevirtNodeWatcher.java b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/KubevirtNodeWatcher.java
index 3949d79..c3cc427 100644
--- a/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/KubevirtNodeWatcher.java
+++ b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/KubevirtNodeWatcher.java
@@ -176,7 +176,7 @@
             // due to the bugs in fabric8, node watcher might be closed,
             // we will re-instantiate the node watcher in this case
             // FIXME: https://github.com/fabric8io/kubernetes-client/issues/2135
-            log.warn("Node watcher OnClose, re-instantiate the node watcher...");
+            log.info("Node watcher OnClose, re-instantiate the node watcher...");
             instantiateNodeWatcher();
         }