Fix analytics pipeline to match new external addressing approach

Change-Id: I5c534f7639e7e384a90c9f38b6b5a5ad890e3437
diff --git a/helm/analytics_pipeline/tweepub.yml b/helm/analytics_pipeline/tweepub.yml
index 42678a3..daa62ca 100644
--- a/helm/analytics_pipeline/tweepub.yml
+++ b/helm/analytics_pipeline/tweepub.yml
@@ -19,5 +19,6 @@
               locations: -71.4415,41.9860,-70.4747,42.9041,-122.75,36.8,-121.75,37.8,-74,40,-73,41
             kafka:
               deployChart: false
-              externalAddress: ${_param:analytics_kafka_address}
               topic: twitter-stream
+              addresses:
+                kafka: ${_param:analytics_kafka_address}