When updating Cucumber Tests via REST API, we just must update the fields passed in the testInfo field

When updating Cucumber Tests via REST API, we just must update the fields passed in the testInfo field. Currently, the filled existing fields in Jira are being deleted if not present in the info file.

Example:
1. Import a feature file a pass a testInfo JSON with the field description - the Test is created and the description set.
2. Import the same feature file, but this time with a testInfo JSON just with a new label. - the Test is updated, the label is created; nevertheless, the existing Description is deleted.