Railtie and Require issues

Similarly, let's check that the signed message matches what we'd get from our verifier:

```ruby
@app.config.global_id.verifier = custom_verifier = ActiveSupport::MessageVerifier.new('muchSECRETsoHIDDEN', serializer: StringSerializer.new)
#...
assert_equal custom_verifier.generate(message), signed_message
```