Properties annotated with @Riak... should be ignored unless they are annotated with @JsonProperty

Properties annotated with `@Riak...` should be ignored by Jackson unless annotated with `@JsonProperty("...")`, please confirm that the fix is correct, the old code had some weird check, I think the fix is more generic and will always find the passed annotation, but needs double check, it is working on my side in our application (Ignoring `@RiakKey` and `@RiakIndex` correctly unless told otherwise)

When I said weird check, for superclass, properties annotated with any `@Riak...` annotation, the property wasn't ignored so I guess it is bug? Shouldn't it be consistent? For what I saw in the code I think the intention of RiakJsonSerializer is to ignore any property that has a `@Riak...` annotation unless the property was annotated with `@JsonProperty` (Explicit inclusion)