Running health check on Red Hat Satellite 6 fails with error Couldn't connect to the server: undefined method `to_sym' for nil:NilClass

Issue

• The hammer ping return candlepin and candlepin_auth service as fail with below error.

  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
  

• The satellite-maintain health check throws below error.

  Check whether all services are running using the ping call:           [FAIL]
  Couldn't connect to the server: undefined method `to_sym' for nil:NilClass