Fix analytics pipeline to match new external addressing approach

Change-Id: I5c534f7639e7e384a90c9f38b6b5a5ad890e3437
diff --git a/helm/analytics_pipeline/kafka.yml b/helm/analytics_pipeline/kafka.yml
index 3c88299..3911bd0 100644
--- a/helm/analytics_pipeline/kafka.yml
+++ b/helm/analytics_pipeline/kafka.yml
@@ -14,4 +14,5 @@
             antiAffinity: soft
             zookeeper:
               deployChart: false
-              externalAddress: ${_param:analytics_zookeeper_address}
+              addresses:
+                zookeeper: ${_param:analytics_zookeeper_address}