Please read THREESCALE-1966. It was the parent task of this issue but had to be rearranged because...jira.

Dev notes

Estimate is for implementing phase 2 of the parent issue:

Phase 2

THREESCALE-2699
2. Create a table gateway_settings where we will be storing the apicast_default_policies_url (It could be stored as a JSON so it will be more flexible to add non-indexed fields later)
3. When a service is using APIcast self-managed, then the default URL (1) will be used
4. There will be in the UI/API a way to set the apicast_default_policies_url so that it will override the default (3)

1. mockup for field, label, and place in navigation
2. Create a table gateway_settings where we will be storing the apicast_default_policies_url (It could be stored as a JSON so it will be more flexible to add non-indexed fields) DONE in https://github.com/3scale/porta/commit/ab25b6cebdb808697cf59a04a5276e959593ad1c
3. When a service is using APIcast self-managed, then the default URL (1) will be used
4. There will be in the UI/API a way to set the apicast_default_policies_url so that it will override the default (3)

Implementation details:

We would need to modify https://github.com/3scale/porta/blob/ee40057e6bb2922be9f68223e2d27f6c2fb68d8f/app/services/policies/policies_list_service.rb#L15-L17

To accept if it is self-managed or hosted and use the proper URL accordingly