Implement L2 load balancer support in XConnectManager

Change-Id: Ib310a1dde72db38abb60273ce66b5f72768bf4ca
diff --git a/apps/segmentrouting/BUCK b/apps/segmentrouting/BUCK
index 1b3990f..f56834e 100644
--- a/apps/segmentrouting/BUCK
+++ b/apps/segmentrouting/BUCK
@@ -9,5 +9,9 @@
     url = 'http://onosproject.org',
     included_bundles = BUNDLES,
     description = 'Segment routing application.',
-    required_apps = [ 'org.onosproject.route-service', 'org.onosproject.mcast' ],
+    required_apps = [
+        'org.onosproject.route-service',
+        'org.onosproject.mcast',
+        'org.onosproject.l2lb',
+    ],
 )