Discovery of 3scale APIs

(Migrated from https://github.com/syndesisio/syndesis/issues/5112)

Author: Heiko Braun
Assignees: Zoran Regvart,
(See also https://issues.jboss.org/browse/ENTESB-11338)

As a citizen integrator when I create an API client connector, I want to be able to access my APIs already managed by 3scale in the same namespace.
DoD
I want to be able to browse all 'applicable' APIs (where applicable means the API is set to discoverable in 3scale)
I want to seamlessly add my API (no authentication steps required)

Stretch:
I want to be able to navigate to the API descriptions in 3scale

Discussion details shared by Andrew:

• Discover APIs managed by 3scale in the same cluster
  Use k8s labels? - 3scale or customer labels them
  Query 3scale via it's API (need to get a secret from the cluster...)
  Search for resources in the clusters? (for CRD created ones)
• Discover (any) API in the same k8s cluster
  Use routes or labeled routes? (Need to think about wild-card routes maybe?)
• Discover 3scale managed services "anywhere"
  local cluster (as above)
  other clusters? need a registry, or to know the cluster(s) to look in
  3scale SaaS - query via it's API (limited to your provider via provider key)
• Discover any APIs elsewhere
  Need the central Registry of APIs and be able to query it via API...