CORS mappings allowedOrigins not parsed properly

[okoskine]

Expected Behavior

Allowed origins for CORS mappings should be obeyed. E.g.

grails:
   cors:
       enabled: true
       mappings:
           '[/a/**]':
               allowedOrigins:
                   - https://a.example.com
                   - https://a.example.org
           '[/b/**]':
               allowedOrigins:
                   - https://b.example.com
                   - https://b.example.org

Actual Behaviour

The allowedOrigins list is not found in the config (instead the list items are indexed there separately):

=> All CORS mappings use the default (*) allowedOrigins.

Steps To Reproduce

1. grails create-app cors
2. add cors mappings with allowedOrigins to application.yml

Environment Information

• Operating System: Linux
• JDK Version: 1.8.0_352

Example Application

https://github.com/okoskine/grails5-cors-config-issue

Version

5.2.5

[puneetbehl]

I think it is duplicate of #12719