Allow changedetector to ignore status codes as a per-site setting (#479) (#485)

Co-authored-by: Ara Hayrabedian <ara.hayrabedian@gmail.com>

changedetectionio/tests/test_errorhandling.py

@@ -1,6 +1,7 @@
 #!/usr/bin/python3
 
 import time
+
 from flask import url_for
 from . util import live_server_setup
 
@@ -17,7 +18,9 @@ def test_error_handler(client, live_server):
     time.sleep(1)
 
     # Add our URL to the import page
-    test_url = url_for('test_endpoint_403_error', _external=True)
+    test_url = url_for('test_endpoint',
+                       status_code=403,
+                       _external=True)
     res = client.post(
         url_for("import_page"),
         data={"urls": test_url},