Merge branch 'yandex_rebiling' into 'dev'

finance logging

See merge request !380

finance/models.py

@@ -29,11 +29,15 @@ class Bill(models.Model):
 
     def freeze_course(self, user):
         if self.invoice_set.exclude(status='F').exists():
+            log = False
             try:
                 p = Progress.objects.get(user=user, course_token=self.course_token)
                 p.freeze = True
                 p.save()
             except Progress.DoesNotExist:
+                log = True
+
+            if log:
                 logger_business_rules.info('Отказ от платежей прошёл успешно', exc_info=True, extra={
                     'description': 'The privileges were not taken away, as they were not granted',
                     'user': user,