Investigate and Fix bug with dateTime CustomAttribute instance JSON property value

[christophermlawson]

No description provided.

[christophermlawson]

From native side, a dateTime typed CustomAttribute instance property is set as a string ("2021-08-19T16:37:42.278") in the returned JSON. This is not validated or processed during deserialization, so the in-memory schema has this set as a string as well. If you then serialize the Schema to xml, the error below occurs, because we are assuming this property value is of type dateTime.

Retrieving Bentley_Civil_Entries.04.00.00
ITwinSlimClient.ts:86
Uncaught TypeError TypeError: propertyValue.getTime is not a function
at writePrimitiveProperty (c:\Source\sandbox\schema-exporter\node_modules@itwin\ecschema-metadata\lib\cjs\Deserialization\XmlSerializationUtils.js:138:61)
at writeInstanceProperty (c:\Source\sandbox\schema-exporter\node_modules@itwin\ecschema-metadata\lib\cjs\Deserialization\XmlSerializationUtils.js:57:19)
at writeCustomAttribute (c:\Source\sandbox\schema-exporter\node_modules@itwin\ecschema-metadata\lib\cjs\Deserialization\XmlSerializationUtils.js:35:19)
at processTicksAndRejections (internal/process/task_queues:95:5)
XmlSerializationUtils.js:138
Process exited with code 1e