Aligning with Bash style guide

Aligning with Bash style guide

Author: lanicolas

articles/hdinsight/kafka/apache-kafka-streams-api.md

@@ -155,13 +155,13 @@ To build and deploy the project to your Kafka on HDInsight cluster, use the foll
 3. Set up password variable. Replace `PASSWORD` with the cluster login password, then enter the command:
 
     ```bash
-    export password='PASSWORD'
+    export PASSWORD='PASSWORD'
     ```
 
 4. Extract correctly cased cluster name. The actual casing of the cluster name may be different than you expect, depending on how the cluster was created. This command will obtain the actual casing, and then store it in a variable. Enter the following command:
 
     ```bash
-    export clusterName=$(curl -u admin:$password -sS -G "http://headnodehost:8080/api/v1/clusters" | jq -r '.items[].Clusters.cluster_name')
+    export CLUSTER_NAME=$(curl -u admin:$PASSWORD -sS -G "http://headnodehost:8080/api/v1/clusters" | jq -r '.items[].Clusters.cluster_name')
     ```
 
     > [!Note]  
@@ -170,9 +170,9 @@ To build and deploy the project to your Kafka on HDInsight cluster, use the foll
 5. To get the Kafka broker hosts and the Apache Zookeeper hosts, use the following commands. When prompted, enter the password for the cluster login (admin) account.
 
     ```bash
-    export KAFKAZKHOSTS=$(curl -sS -u admin:$password -G https://$clusterName.azurehdinsight.net/api/v1/clusters/$clusterName/services/ZOOKEEPER/components/ZOOKEEPER_SERVER | jq -r '["\(.host_components[].HostRoles.host_name):2181"] | join(",")' | cut -d',' -f1,2);
+    export KAFKAZKHOSTS=$(curl -sS -u admin:$PASSWORD -G https://$CLUSTER_NAME.azurehdinsight.net/api/v1/clusters/$CLUSTER_NAME/services/ZOOKEEPER/components/ZOOKEEPER_SERVER | jq -r '["\(.host_components[].HostRoles.host_name):2181"] | join(",")' | cut -d',' -f1,2);
 
-    export KAFKABROKERS=$(curl -sS -u admin:$password -G https://$clusterName.azurehdinsight.net/api/v1/clusters/$clusterName/services/KAFKA/components/KAFKA_BROKER | jq -r '["\(.host_components[].HostRoles.host_name):9092"] | join(",")' | cut -d',' -f1,2);
+    export KAFKABROKERS=$(curl -sS -u admin:$PASSWORD -G https://$CLUSTER_NAME.azurehdinsight.net/api/v1/clusters/$CLUSTER_NAME/services/KAFKA/components/KAFKA_BROKER | jq -r '["\(.host_components[].HostRoles.host_name):9092"] | join(",")' | cut -d',' -f1,2);
     ```
 
     > [!Note]