protected Properties createConsumerConfigs() {
    Properties consumerProps = new Properties();
    consumerProps.setProperty(CommonClientConfigs.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers());
    consumerProps.setProperty(GROUP_ID_CONFIG, "group");
    consumerProps.setProperty(AUTO_OFFSET_RESET_CONFIG, "earliest");
    consumerProps.setProperty(KEY_DESERIALIZER_CLASS_CONFIG, STRING_DESERIALIZER);
    consumerProps.setProperty(VALUE_DESERIALIZER_CLASS_CONFIG, BYTE_ARRAY_DESERIALIZER);
    return consumerProps;
  }
Overrides of method should provide the following mandatory configurations
 1. bootstrap.servers
 2. key.deserializer
 3. value.deserializer
 4. auto.offset.reset
 5. group.id

@return {@link Properties} for the test kafka consumer
samza-test/src/test/java/org/apache/samza/test/harness/IntegrationTestHarness.java