Made a few adjustments to test the beta redirect:

- Explicitly return the redirect
- Change the redirect to be a 302 instead of 301
- Adjusted the test client to allow sub domains
- Added the remaining tests

A big thank you to @A-Shumway42 for getting this work underway!

Signed-off-by: Carlo Costino <carlo.costino@gsa.gov>

tests/conftest.py

@@ -2392,6 +2392,7 @@ def _client(notify_admin):
     Do not use this fixture directly – use `client_request` instead
     """
     with notify_admin.test_request_context(), notify_admin.test_client() as client:
+        client.allow_subdomain_redirects = True
         yield client