Better output format for hex group id

Change-Id: Ic765642d494acf48f214618afe88f0f9c371fde4
diff --git a/cli/src/main/java/org/onosproject/cli/net/GroupsListCommand.java b/cli/src/main/java/org/onosproject/cli/net/GroupsListCommand.java
index 8e30fa4..ee6d31b 100644
--- a/cli/src/main/java/org/onosproject/cli/net/GroupsListCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/GroupsListCommand.java
@@ -46,9 +46,9 @@
 public class GroupsListCommand extends AbstractShellCommand {
 
     private static final String FORMAT =
-            "   id=%s, state=%s, type=%s, bytes=%s, packets=%s, appId=%s";
+            "   id=0x%s, state=%s, type=%s, bytes=%s, packets=%s, appId=%s";
     private static final String BUCKET_FORMAT =
-            "   id=%s, bucket=%s, bytes=%s, packets=%s, actions=%s";
+            "   id=0x%s, bucket=%s, bytes=%s, packets=%s, actions=%s";
 
     @Argument(index = 1, name = "uri", description = "Device ID",
             required = false, multiValued = false)