Ensure sorting does not happen when sort_by is set to "none"

[eclarizio]

I didn't dig in too deep to track down how the code is getting through this point where the sort_by isn't a symbol, but basically we were ignoring the fact that sort_by in the options was a string instead of a symbol (when creating/updating/editing an existing dialog, the sort_by= code automatically forces it into a symbol so this was getting bypassed).

So, this was causing us to attempt to sort the items in the values list even if the none sort_by value was selected. This will need to be combined with the fix from the ui-components repo here since the javascript code was also attempting to sort even when the sort_by value was none.

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1593874

@miq-bot add_label gaprindashvili/yes, bug, blocker
@d-m-u Please review
@miq-bot assign @gmcculloug

/cc @tinaafitz

[miq-bot]

Checked commit eclarizio@145052a with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
2 files checked, 0 offenses detected
Everything looks fine. 🍰

[simaishi]

Gaprindashvili backport details:

$ git log -1
commit 9048714a52b4611dadaf1484b3f4fd9b2aa9fa7b
Author: Greg McCullough <[email protected]>
Date:   Thu Jun 21 19:01:27 2018 -0400

    Merge pull request #17625 from eclarizio/BZ1593874
    
    Ensure sorting does not happen when sort_by is set to "none"
    (cherry picked from commit 8e109d6530e8535a5524dbe4050598c210fe72ee)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1594268