Bump wurstmeister/kafka to 2.13-2.6.3

Kafka v2.6.3 is the latest fix level on the v2.6.x which is recommended by AWS
as stable release.

Change-Id: I0073be42fd303aaa398b4a51adf0c6ada7ca6260

docker-compose.kafka-broker.yaml

diff --git a/docker-compose.kafka-broker.yaml b/docker-compose.kafka-broker.yaml
index 927b4d4..d3fc713 100644
--- a/docker-compose.kafka-broker.yaml
+++ b/docker-compose.kafka-broker.yaml
@@ -5,7 +5,7 @@
     ports:
       - "2181:2181"
   kafka:
-    image: wurstmeister/kafka:2.12-2.1.0
+    image: wurstmeister/kafka:2.13-2.6.3
     ports:
       - "9092:9092"
     environment:

e2e-tests/docker-compose-kafka.yaml

diff --git a/e2e-tests/docker-compose-kafka.yaml b/e2e-tests/docker-compose-kafka.yaml
index da39cca..addb8d5 100644
--- a/e2e-tests/docker-compose-kafka.yaml
+++ b/e2e-tests/docker-compose-kafka.yaml
@@ -1,7 +1,7 @@
 version: '3'
 services:
   kafka:
-    image: wurstmeister/kafka:2.12-2.1.0
+    image: wurstmeister/kafka:2.13-2.6.3
     depends_on:
       - zookeeper
     environment:

setup_local_env/docker-compose-kafka.yaml

diff --git a/setup_local_env/docker-compose-kafka.yaml b/setup_local_env/docker-compose-kafka.yaml
index 8a31502..2a5b0fc 100644
--- a/setup_local_env/docker-compose-kafka.yaml
+++ b/setup_local_env/docker-compose-kafka.yaml
@@ -1,7 +1,7 @@
 version: '3'
 services:
   kafka:
-    image: wurstmeister/kafka:2.12-2.1.0
+    image: wurstmeister/kafka:2.13-2.6.3
     ports:
       - "9092:9092"
     container_name: kafka_test_node