Update make target to be compliant with new Jenkins jobs

Also, update conf.yaml file with the correct BNG stats topic

Change-Id: I3ab0cfdf476c65aaa661d91bb2bd87d0f13f6680
diff --git a/config/conf.yaml b/config/conf.yaml
index 57b13ed..633273a 100644
--- a/config/conf.yaml
+++ b/config/conf.yaml
@@ -7,7 +7,7 @@
     - voltha.kpis
     - onos.kpis
     - onos.aaa.stats.kpis
-    - pppoe.stats
+    - bng.stats
 logger:
   loglevel: debug
   host: cord-kafka.default.svc.cluster.local:9092