Mild REST API refactoring.

Change-Id: Ieddbbd02328043118ad64077f8eda746eb2b3a9f
diff --git a/web/api/src/main/java/org/onosproject/rest/ComponentConfigWebResource.java b/web/api/src/main/java/org/onosproject/rest/ComponentConfigWebResource.java
index 07fe8a1..7de3d70 100644
--- a/web/api/src/main/java/org/onosproject/rest/ComponentConfigWebResource.java
+++ b/web/api/src/main/java/org/onosproject/rest/ComponentConfigWebResource.java
@@ -29,6 +29,8 @@
 import java.io.InputStream;
 import java.util.Set;
 
+import static org.onlab.util.Tools.nullIsNotFound;
+
 /**
  * REST resource for cluster-wide component configuration.
  */