Returns a user object based on a displayName (Full Name)
For Jira Cloud
This affects user fields synchronization since Exalate uses API to search by email. Therefore, make sure that the email and Full Name are visible for the Exalate app in the Atlassian account.
Example use in Azure DevOps 5.4.0
workItem.assignee = nodeHelper.getUserByFullName(replica.assignee.displayName, issue.project.key)