Raise exception on error

Signed-off-by: Michal Čihař <michal@cihar.com>

news/management/commands/import_rss_news.py

@@ -103,6 +103,6 @@ def handle(self, *args, **options):
         data = handle.read()
         parsed = feedparser.parse(data)
         if parsed.bozo == 1:
-            self.stderr.write(parsed.bozo_exception)
+            raise CommandError(parsed.bozo_exception)
         else:
             self.process_feed(parsed)