Configurable date formats for resource parameters

The date pattern can be configured globally from the `RestDispatchAsyncModuleBuilder` or individually by using the brand new `@DateFormat` annotation. The default pattern is ISO-8601 compliant (`yyyy-MM-dd'T'HH:mm:ss.SSSZZZ`).

@meriouma, is the CI configured to deploy snapshots automatically? I need this feature ASAP.