Fixed typo in Service Retirement method.

[billfitzgerald0120]

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.

https://bugzilla.redhat.com/show_bug.cgi?id=1440972

@miq-bot add_label bug, services, fine/yes
@miq-bot assign @gmcculloug

[billfitzgerald0120]

I re-created the customer problem by creating a Service Retirement Complete email and trying to retire the service 4 times in a row.
Without the change 4 emails were sent :
[----] I, [2017-09-22T10:48:00.986676 #76788:3fcc722266bc] INFO -- : Sending email to evmadmin@example.com from evmadmin@example.com subject:
[----] I, [2017-09-22T10:48:18.335278 #76788:3fcc7266b4fc] INFO -- : Sending email to evmadmin@example.com from evmadmin@example.com subject:
[----] I, [2017-09-22T10:51:37.945849 #76788:3fcc75040ac0] INFO -- : Sending email to evmadmin@example.com from evmadmin@example.com subject:
[----] I, [2017-09-22T10:52:48.356761 #80331:3fcc723c20c0] INFO -- : Sending email to evmadmin@example.com from evmadmin@example.com subject:

With the change only 1 email was sent:
[----] I, [2017-09-22T11:09:57.171425 #80331:3fcc72abb78c] INFO -- : Sending email to evmadmin@example.com from evmadmin@example.com subject:

[billfitzgerald0120]

@tinaafitz Please Review

[miq-bot]

Checked commit billfitzgerald0120@0ccaec8 with ruby 2.2.6, rubocop 0.47.1, and haml-lint 0.20.0
1 file checked, 0 offenses detected
Everything looks fine. 👍

[gmcculloug]

Previously discussed this issue with @tinaafitz. Change looks good. 👍

[simaishi]

Fine backport details:

$ git log -1
commit 748594395090f25ed3304092ea386b3bc5ca78ae
Author: Greg McCullough <gmccullo@redhat.com>
Date:   Fri Sep 22 16:47:19 2017 -0400

    Merge pull request #189 from billfitzgerald0120/service_retirement_typo
    
    Fixed typo in Service Retirement method.
    (cherry picked from commit 5c1d10ffcfe7292f3d77e5a072aeab7221ce21f4)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1496947