Fix ONOS-5091

Change-Id: I11762eb799c1f93536f472807167cdba20a7c8e6
(cherry picked from commit 45f806ccedf844dfc8fe1722eca653f274b83f12)
diff --git a/web/api/src/test/java/org/onosproject/rest/resources/GroupsResourceTest.java b/web/api/src/test/java/org/onosproject/rest/resources/GroupsResourceTest.java
index 63a7daa..67cf11b 100644
--- a/web/api/src/test/java/org/onosproject/rest/resources/GroupsResourceTest.java
+++ b/web/api/src/test/java/org/onosproject/rest/resources/GroupsResourceTest.java
@@ -280,9 +280,9 @@
 
             // check application id
             final String jsonAppId = jsonGroup.get("appId").asString();
-            final String appId = group.appId().toString();
+            final String appId = group.appId().name();
             if (!jsonAppId.equals(appId)) {
-                reason = "appId " + group.appId().toString();
+                reason = "appId " + group.appId().name();
                 return false;
             }