fix exception for container failing to start not being raised

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

tests/e2e/utils.py

@@ -95,7 +95,7 @@ class DockerTestCase(TestCase):
             sleep(1)
             attempt += 1
             if attempt >= self.max_healthcheck_attempts:
-                self.failureException("Container failed to start")
+                raise self.failureException("Container failed to start")
 
     def get_container_image(self, base: str) -> str:
         """Try to pull docker image based on git branch, fallback to main if not found."""