add support to json "title": "..." through

[matlach]

According to : http://spacetelescope.github.io/understanding-json-schema/reference/generic.html#metadata along side "description" we also should be able to define the "title" property.

For description, this is achievable using @JsonPropertyDescription("..."). We should consider adding another annotation like @JsonPropertyTitle("...") to fill the gap.

Thanks,