Filter out mask annotations and add a customer serializer to the client

[lyleschemmerling]

Adds the ability to set a custom object mapper on the java client and updates api call methods to check for the custom mapper before making the call and using that if available.

Update to use the savant copy plugin that now accepts regex so that we can filter out the mask annotations. Also filters out the @InternalUse annotation which looks to have been shipped unintentionally