Upgrade check failure with candlepin, candlepin_auth, and foreman_tasks services in Red Hat Satellite 6.15

Issue

• Candlepin, candlepin_auth, and candlepin_events fail in hammer ping on Red Hat Satellite

  candlepin:
  Status:          FAIL
  Server Response: Message: Failed to open TCP connection to localhost:23443 (Connection refused - connect(2) for "localhost" port 23443)
  candlepin_auth:
  Status:          FAIL
  Server Response: Message: A backend service [ Candlepin ] is unreachable
  candlepin_events:
  Status:          FAIL
  message:         Not running
  Server Response: Duration: 0ms