@Override
        public String bootstrapServers() {
            return clusterTestKit.bootstrapServers();
        }
Wraps a {@link KafkaClusterTestKit} inside lifecycle methods for a test invocation. Each instance of this
class is provided with a configuration for the cluster.

This context also provides parameter resolvers for:

<ul>
    <li>ClusterConfig (the same instance passed to the constructor)</li>
    <li>ClusterInstance (includes methods to expose underlying SocketServer-s)</li>
</ul>
core/src/test/java/kafka/test/junit/RaftClusterInvocationContext.java