Honor JsonProperty when serializing a JsonPatchDocument.

[KevinDockx]

An issue was logged on the issue list of Marvin.JsonPatch (on which AspNetCore.JsonPatch is based, which is why I'm logging this issue) regarding honoring JSON.NET's JsonProperty (KevinDockx/JsonPatch#44 (comment)).

The AspNetCore version supports this when applying a patchDoc to a class that has properties decorated with [JsonProperty] attributes. Marvin.JsonPatch doesn't (PCL stuff), so that's not an issue for AspNetCore's version. But it's the last comment of Amnesia1187 that's of importance, as it affects AspNetCore.JsonPatch.

It's regarding creating a JsonPatchDocument on the consumer-side of things. Such a document is serialized to a Json list of operations, and the "path"-portion contains the property name the patch operation affects. That part apparently does not respect JsonProperty values.

So, if you create a JsonPatchDocument, and MyClass contains a property "Name" decorated with JsonProperty("RealName"), it will be serialized to path: "/name" instead of "realName".

I feel it should serialize to realName. Thoughts on this?

[KevinDockx]

FYI, I fixed this issue in Marvin.JsonPatch. I'd be happy to provide a PR with the required changes.

[Eilon]

Looks like #35 was merged, so closing this bug. Thanks!