Add logic to update missing user state and region values

[nickviola]

🗣 Description

Closes: https://maestro.dhs.gov/jira/browse/CRASM-345

Need to prompt user for State dropdown selection if user.state is null, undefined, or “”. A dropdown should be presented on login if a user does not have a state value set.

Modify the backend users API to update the regionId field upon updating state values from the region/state mapping that was previously being used in registration.

Once a user selects a state and clicks “save”, they will have their state and regionId values updated and proceed to the landing page of the application. The user will continue to get the prompt for state selection as long as the value is not set.

💭 Motivation and context

State and Region values were null on user import/export, so this allows the user to select the information on login.

🧪 Testing

Test locally by removing state and regionId values manually in DB, and then logging in. You should be asked to update state and see the change for regionId and state update in the Database. Once state is set, you should no longer get this prompt on login.

📷 Screenshots (if appropriate)

✅ Pre-approval checklist

• This PR has an informative and human-readable title.
• Changes are limited to a single goal - eschew scope creep!
• All future TODOs are captured in issues, which are referenced
  in code comments.
• All relevant type-of-change labels have been added.
• I have read the CONTRIBUTING document.
• These code changes follow cisagov code standards.
• All relevant repo and/or project documentation has been updated
  to reflect the changes in this PR.
• Tests have been added and/or modified to cover the changes in this PR.
• All new and existing tests pass.

[cduhn17]

LGTM

[ameliav]

LGTM