Include missing properties on mapping field types

[fredeil]

Hey again @stevejgordon and rest of the maintainers,

I'm missing the ignore_malformed property on the IP field type in C#. I'm sure there are more types missing other properties too.

To be more specific I'm trying to set this using the IP Attribute mapping https://github.com/elastic/elasticsearch-net/blob/master/src/Nest/Mapping/Types/Specialized/Ip/IpAttribute.cs.

Today we have to maintain a JSON version of the mapping and a C# version of the index mapping because of these limitations.

[stevejgordon]

Apologies for the delay @fredeil. I'll take a look at this as it's likely an oversight. It's one of the reasons for moving to code-generating these properties from a schema for v8.

[stevejgordon]

@fredeil I have added a fix for this which we'll include in the next release.