add cord-kafka to the helm-based tests

Change-Id: I86d6ee9b935d5dfb548fb33edf3dabc2088f57c1
diff --git a/jjb/pipeline/chart-api-test-helm.groovy b/jjb/pipeline/chart-api-test-helm.groovy
index 9149221..aef03f9 100644
--- a/jjb/pipeline/chart-api-test-helm.groovy
+++ b/jjb/pipeline/chart-api-test-helm.groovy
@@ -77,6 +77,21 @@
       }
     }
 
+    stage('cord-kafka') {
+      steps {
+        sh '''
+           #!/usr/bin/env bash
+           set -eu -o pipefail
+
+           pushd cord/helm-charts
+           helm install -f examples/kafka-single.yaml --version 0.8.8 -n cord-kafka incubator/kafka
+           scripts/wait_for_pods.sh
+
+           popd
+           '''
+      }
+    }
+
     stage('install/test rcord-lite') {
       steps {
         sh """