PIMS-1490 Last name fix

[dbarkowsky]

🎯 Summary

PIMS-1490

Changes

• Update usernameUpdater tool to add check if the last name field is empty and get the last name from the first name field if available

Tested locally and then in DEV. Please see DEV to check if the changes are acceptable.

🔰 Checklist

• I have read and agree with the following checklist and am following the guidelines in our Code of Conduct document.

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation where required.
• I have tested my changes to the best of my ability.
• My changes generate no new warnings.

[LawrenceLau2020]

Looking good, much more consistent user data now.