Fixed typo in Service Retirement method.

update_service_retirement_status method had incorrect step name.

This caused a problem when trying to retire a service that is already in the process of being retired.

content/automate/ManageIQ/Service/Retirement/StateMachines/ServiceRetirement.class/__methods__/update_service_retirement_status.rb

@@ -32,7 +32,7 @@
 # Update Status for on_error for all states other than the first state which is start retirement
 # in the retirement state machine.
 if $evm.root['ae_result'] == 'error'
-  if step.downcase == 'start retirement'
+  if step.downcase == 'startretirement'
     msg = 'Cannot continue because Service is '
     msg += service ? "#{service.retirement_state}." : 'nil.'
     $evm.log('info', msg)