e2e: attempt to fix prospector error again

.pylintrc

@@ -12,6 +12,7 @@ disable =
     signature-differs,
     similarities,
     cyclic-import,
+    protected-access,
     unsubscriptable-object # remove when pylint is upgraded to 2.6
 
 load-plugins=pylint_django,pylint.extensions.bad_builtin

e2e/utils.py

@@ -156,7 +156,7 @@ def retry(max_retires=3, exceptions=None):
                     raise exc
                 logger.debug("Retrying on error", exc=exc, test=self)
                 self.tearDown()
-                self._post_teardown()
+                self._post_teardown()  # noqa
                 self.setUp()
                 return wrapper(self, *args, **kwargs)