archimed mapper: fix login url

cam/configs/archimed_saml.py

@@ -8,7 +8,7 @@ from cam import config
 base = 'EXPLOITATION'
 
 form_values = {
-        'login_url': '/%s/Default/accueil-ermes.aspx' % base,
+        'login_url': '/%s' % base,
         'post_url': '/%s/Default/Ermes/Recherche/logon.svc/logon' % base,
         'post_fields': ['username', 'password'],
         'username_field': 'username',