Cleaning up application categories.

Change-Id: Id3c937323123b6089cedf7b31cd01151f6aca8e1
diff --git a/apps/routeradvertisement/BUCK b/apps/routeradvertisement/BUCK
index f77c16a..c414ec3 100644
--- a/apps/routeradvertisement/BUCK
+++ b/apps/routeradvertisement/BUCK
@@ -17,7 +17,7 @@
 
 onos_app (
     title = 'IPv6 RA Generator',
-    category = 'Traffic Steering',
+    category = 'Traffic Engineering',
     url = 'http://onosproject.org',
     description = 'Application for generating IPv6 RAs',
 )