Upgrade playbook fails: urlopen error [Errno 111] Connection refused

Issue

Upgrade playbook fails during the Upgrade Service Catalog play.

1. Error : 
     Hosts:    master-0.server.example.node.com
     Play:     Upgrade Service Catalog
     Task:     Verify that TSB is running
     Message:  Status code was not [200]: Request failed: <urlopen error [Errno 111] Connection refused>

Returns error code similar to older non OCP issues here and here.