Merge pull request #106 from onobc

* gh-106:
  Make cloud-stream-kafka smoke test compatible with docker-compose v2

Closes gh-106

cloud-stream-kafka/docker-compose.yml

@@ -2,6 +2,7 @@ version: '3'
 services:
   kafka:
     image: wurstmeister/kafka
+    hostname: kafka
     ports:
       - '9092'
     volumes:
@@ -12,7 +13,7 @@ services:
       KAFKA_LISTENERS: PLAINTEXT://:29092,PLAINTEXT_HOST://:9092
       KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:29092,PLAINTEXT_HOST://localhost:_{PORT_COMMAND}
       KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
-      PORT_COMMAND: "docker ps | grep kafka_1 | cut -d: -f 2 | cut -d- -f 1"
+      PORT_COMMAND: "docker ps | egrep 'kafka(-|_)1' | cut -d: -f 2 | cut -d- -f 1"
     depends_on:
       - zookeeper