Object matching fails when callers do not use correct implicit ID type #55

* unit test for BIGINT PUT - problem repdoducible
 Object matching fails when callers do not use correct implicit ID type #55

* unit test for BIGINT as parent ID parameter
 Object matching fails when callers do not use correct implicit ID type #55

* real BIGINT value
Support for Long IDs in updates #57

for now we only ahve special handlign for Long (and Date as we did previously)
but the change introduces IJsonValueConverterFactory that should be a good place to
add other special types