Allow admin to manage global policies

As super-admin of Wazo

I want to define default policies which be available on all my sub-tenant
This is a kind of global policies, but scoped by tenant and its sub-tenant

Behavior

GET /policies and GET /policies/uuid

• For owner tenant: these policies will appear with an attribute True/False to distinguish from other policies

• For sub-tenant: policies will have read-only: True attribute

• For sub-tenant, the tenant_uuid will be the same as their own tenant (same behavior than config_managed policies)

PUT/DELETE policies/uuid

• will return 403 for sub-tenants

• for the owner, can be done as a standard policy

• For DELETE, will delete all association for sub-tenant too

• For PUT, the attribute cannot be updated (too complicate to handle True → False transition)

POST /policies

• Can be created by ANY tenant even if there is no sub-tenant

• Slug will need to be unique across all tenants