Add support for serialization intoadditionalInfo: AdditionalInfo from Map, case class, other collections... #90
Description
Background
Right now the AdditionalInfo type in error handling is just a synonym for String, while the intention is it to be a JSON.
Right now though any garbage can be put into the field.
Feature
Turn the type into a value class with a private constructor and an apply method that will serialize provided objects into json.
Of course keep a constructor to allow an empty AdditionalInfo.
Also create an implicit conversion from the value class to String for easy push into Spark,