Better errors for changes like #511, which should now fail with:
[info] ManagedCloudstateTCK:
[service] latest: Pulling from cloudstateio/cloudstate-go-tck
[service] Digest: sha256:1b82e2d9d0bbeed4e5a3aeb626922c31a94534d2f1774d8b01b4447f1e763a18
[service] Status: Image is up to date for cloudstateio/cloudstate-go-tck:latest
[service] docker.io/cloudstateio/cloudstate-go-tck:latest
[info] io.cloudstate.tck.TCK *** ABORTED ***
[info] java.lang.AssertionError: No discovery after 60 seconds, last error: UNIMPLEMENTED: unknown method Discover for service cloudstate.EntityDiscovery
[info] at io.cloudstate.testkit.discovery.InterceptEntityDiscovery$.expectOnline(InterceptEntityDiscovery.scala:97)
[...]
Better errors for changes like #511, which should now fail with: