Auto select the single tournament for ETEAM

Signed-off-by: Emmy D'Anello <emmy.danello@animath.fr>

participation/signals.py

@@ -15,6 +15,8 @@ def create_team_participation(instance, created, raw, **_):
     """
     if not raw:
         participation = Participation.objects.get_or_create(team=instance)[0]
+        if settings.TFJM_APP == "ETEAM":
+            participation.tournament = Tournament.objects.first()
         participation.save()
         if not created:
             participation.team.create_mailing_list()