[WEI] Don't manage hardcoded people in repartition algorithm

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

apps/wei/forms/surveys/wei2021.py

@@ -170,7 +170,9 @@ class WEISurveyAlgorithm2021(WEISurveyAlgorithm):
         We modify it to allow buses to have multiple "weddings".
         """
         surveys = list(self.get_survey_class()(r) for r in self.get_registrations())  # All surveys
-        surveys = [s for s in surveys if s.is_complete()]
+        surveys = [s for s in surveys if s.is_complete()]  # Don't consider invalid surveys
+        # Don't manage hardcoded people
+        surveys = [s for s in surveys if not hasattr(s.information, 'hardcoded') or not s.information.hardcoded]
         free_surveys = [s for s in surveys if not s.information.valid]  # Remaining surveys
         while free_surveys:  # Some students are not affected
             survey = free_surveys[0]