InternalSerializationContext throws a NotSupportedException when the object graph contains JObject

Any place InternalSerializationContext is used, such as QueryErrorContext.ToString(), it will throw a NotSupportedException if any of the object graph contains a Newtonsoft.Json.Linq.JObject.

This was discovered during investigation of TXNN-125, as our own Transactions library uses the old Newtonsoft library and mixes in those object.  However, customers could also run into this issue.