This PR fixes spring.rabbitmq.listener.type properties in RabbitAutoConfigurationTests to align with their tests.

Comment From: snicoll

Thanks @izeye. Rather than harmonizing, I've removed the property altogether as those tests were not relying on it at all, see https://github.com/spring-projects/spring-boot/commit/e6c63b5b4e3bc0a37079574094d1bbd258149220