Support for Jackson JsonClassDescription and JsonPropertyDescription

[jjoslet]

Retrieve comments from Jackson annotation JsonClassDescription and JsonPropertyDescription

[jjoslet]

Here is an extension that do the job for the moment: JacksonDescriptionExtension

[vojtechhabarta]

I committed support for these annotations used on classes and their properties and also used on enums and their constants.

[vojtechhabarta]

I released v2.13.489 with this feature.