Fix error_handling during after_request
Fix error_handling during after_request

During the after_request phase if the downstream
storage raised any errors they were not properly handled
in case swallow_errors or in_memory_fallback were enabled.
The underlying error should only be left unhandled if both
swallow_errors & in_memory_fallback are disabled.

alisaifee/flask-limiter,alisaifee/flask-limiter