MatchCandidate type fields are generated with nondeterministic order.

[hatyo]

When generating the Type information for a MatchCandidate we use this RecordMetaData::getFieldDescriptorMap which returns a HashMap of fields that is translated later to a Record type.

This could cause a problem when attempting to reference some of these fields by ordinal (OrdinalFieldValue) as fields could be enlisted differently between a MatchCandidate and a flown type of another operator.