fix concurrency error when creating new users (fixes #9965)

UserSAMLIdentifier is retrieved using get_or_create() first, and if is new
we proceed with the creation of the new user, otherwise we delete the temporaru
user we created use the one attached to the existing UserSAMLIdentifier.

1 files changed, 3 insertions, 0 deletions

diff --git a/testsettings.py b/testsettings.py
index 752a9b1..5f7bb5c 100644
--- a/testsettings.py
+++ b/testsettings.py
@@ -4,6 +4,9 @@ DATABASES = {
     'default': {
         'ENGINE': 'django.db.backends.sqlite3',
         'NAME': 'mellon.sqlite3',
+        'TEST': {
+            'NAME': 'mellon-test.sqlite',
+        },
     }
 }
 DEBUG = True