Fetch uses serializeMapper from ObjectMapperFactory to deserialize

[jpasquers]

nodes/nodes/src/main/java/io/aexp/nodes/graphql/Fetch.java

Line 141 in 9bc0d44

mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);

^The mapper referenced here is the serializeMapper, not a mapperFactory.newDeserializeMapper(). When we had to override the ObjectMapperFactory to do custom deserialization, we ended up having to add the custom logic to the newSerializeMapper()