Cleaning up application titles, descriptions and categories.

Change-Id: I80f9770697cbf29b6bde2b20778c341b0f403d9f
diff --git a/models/l3vpn/BUCK b/models/l3vpn/BUCK
index babafb0..dae4099 100644
--- a/models/l3vpn/BUCK
+++ b/models/l3vpn/BUCK
@@ -1,4 +1,4 @@
 yang_model(
     app_name = 'org.onosproject.models.l3vpn',
-    title = 'L3VPN YANG Model',
+    title = 'L3VPN YANG Models',
 )