Address review comments of the kafka nbi

Change-Id: I4bffdd92bb05d3f4d4b1b077f2ccf0f332204ed2
diff --git a/compose/docker-compose-system-test.yml b/compose/docker-compose-system-test.yml
index aadeebc..5c261f8 100644
--- a/compose/docker-compose-system-test.yml
+++ b/compose/docker-compose-system-test.yml
@@ -13,7 +13,7 @@
   # Single-node kafka service
   #
   kafka:
-    build: ../kafka
+    image: wurstmeister/kafka
     ports:
      - 9092
     environment: