Jackson Serialization for Duration is broken since Spring Boot 2.2 upgrade

[filiphr]

Jackson added a breaking change for the way Duration is serialized. Before The DurationSerializer was using SerializationFeature.WRITE_DATES_AS_TIMESTAMPS to check whether Duration should be serialized as a timestamp or not. Since 2.10 Jackson uses SerializationFeature.WRITE_DURATIONS_AS_TIMESTAMPS to check whether Duration should be serialized as a timestamp or not.

I would suggest that the JacksonAutoConfiguration adds SerializationFeature.WRITE_DURATIONS_AS_TIMESTAMPS with a value false as a default configuration.

This was done in FasterXML/jackson-modules-java8#75

[wilkinsona]

Thanks for the PR, @filiphr. Closing in favour of #19352.