Fix analytics pipeline to match new external addressing approach

Change-Id: I5c534f7639e7e384a90c9f38b6b5a5ad890e3437
diff --git a/helm/analytics_pipeline/spark.yml b/helm/analytics_pipeline/spark.yml
index ebdddff..5533df5 100644
--- a/helm/analytics_pipeline/spark.yml
+++ b/helm/analytics_pipeline/spark.yml
@@ -17,4 +17,5 @@
                 replicas: 3
             zookeeper:
               deployChart: false
-              externalAddress: ${_param:analytics_zookeeper_address}
+              addresses:
+                zookeeper: ${_param:analytics_zookeeper_address}