[VOL-2940] Exposing kafka metrics in scale test

Change-Id: I09d72b1a105e625ef14ca0cd366ca1866f50618c
diff --git a/jjb/pipeline/voltha-scale-test.groovy b/jjb/pipeline/voltha-scale-test.groovy
index a8eaaf6..2c3ff87 100644
--- a/jjb/pipeline/voltha-scale-test.groovy
+++ b/jjb/pipeline/voltha-scale-test.groovy
@@ -158,7 +158,9 @@
       // includes monitoring, kafka, etcd
       steps {
         sh '''
-        helm install kafka incubator/kafka --set replicas=${kafkaReplicas} --set persistence.enabled=false --set zookeeper.replicaCount=${kafkaReplicas} --set zookeeper.persistence.enabled=false
+        helm install kafka incubator/kafka --set replicas=${kafkaReplicas} --set persistence.enabled=false \
+          --set zookeeper.replicaCount=${kafkaReplicas} --set zookeeper.persistence.enabled=false \
+          --set prometheus.kafka.enabled=true,prometheus.operator.enabled=true,prometheus.jmx.enabled=true,prometheus.operator.serviceMonitor.namespace=default
 
         # the ETCD chart use "auth" for resons different than BBsim, so strip that away
         ETCD_FLAGS=$(echo ${extraHelmFlags} | sed -e 's/--set auth=false / /g') | sed -e 's/--set auth=true / /g'