`AtomicReference` serializer does not support `@JsonSerialize(contentConverter=...)`

[cowtowncoder]

Describe your Issue

(note: root cause for FasterXML/jackson-modules-java8#294)

Looks like contentConverter property of @JsonSerialize annotation is not supported for AtomicReference: and since functionality comes from ReferenceTypeSerializer like also other "reference" types (JDK8 and Guava Optionals).