Cleaning up app categories.

Change-Id: I30806c81bf9e8db87f31509d9a346960f79ef207
diff --git a/apps/l3vpn/BUCK b/apps/l3vpn/BUCK
index 1c6d6ef..dbe100a 100644
--- a/apps/l3vpn/BUCK
+++ b/apps/l3vpn/BUCK
@@ -10,7 +10,7 @@
 onos_app(
   app_name = 'org.onosproject.l3vpn',
   title = 'YANG L3VPN App',
-  category = 'L3VPN APP',
+  category = 'Traffic Steering',
   url = 'http://onosproject.org',
   included_bundles = BUNDLES,
   description = 'L3VPN YANG Application',