Integer maximum value `2147483647` but the maximum value for [rabbitmq-delayed-message-exchange](https://github.com/rabbitmq/rabbitmq-delayed-message-exchange#performance-impact) is `(2^32)-1=4294967295` Is it a bug or a feature? https://github.com/spring-projects/spring-amqp/blob/7c945986f82329d6adc23ce8c9b7483ea0301145/spring-amqp/src/main/java/org/springframework/amqp/core/MessageProperties.java#L454