Replace virtualization_tab references with kubevirt_tab

[AparnaKarve]

Replace virtualization_tab references with kubevirt_tab -- this was missed in 583d776

https://bugzilla.redhat.com/show_bug.cgi?id=1650410

---

Before (shows the tiny and almost invisible tab) -

---

After (no tiny/invisible tabs) -

With Virtualization disabled -

With Virtualization set to Kubevirt -

https://bugzilla.redhat.com/show_bug.cgi?id=1650410

[Fryguy]

In general, I don't think that we should be using a provider specific term in the UI. Kubevirt is a specific type of virtualization provider.

(I do understand that this particular form is not pluggable, but I'm not sure this moves anything in the right direction 😕 )

[miq-bot]

Checked commit AparnaKarve@2cfb878 with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
1 file checked, 1 offense detected

**

• 💣 💥 🔥 🚒 - Linter/Haml - Linter::Haml STDERR:

warning: parser/current is loading parser/ruby23, which recognizes
warning: 2.3.6-compliant syntax, but you are running 2.3.3.
warning: please see https://github.com/whitequark/parser#compatibility-with-ruby-mri.

[AparnaKarve]

@Fryguy Agreed! but this patch is simply fixing a mistake and addresses a BZ
The original code was added a while back

[masayag]

Looks good to me + verified locally (including enabling / disabling) the virtualization tab at new/update provider dialogs.

[simaishi]

Hammer backport details:

$ git log -1
commit a8493d1d076932be2f5ecee34bd30c5e3b17d286
Author: Milan Zázrivec <[email protected]>
Date:   Wed Nov 28 07:58:04 2018 +0100

    Merge pull request #5001 from AparnaKarve/fix_kubevirt_refs
    
    Replace `virtualization_tab` references with `kubevirt_tab`
    
    (cherry picked from commit faf462e9d48df5f37ef3ba65eb4e6881f4292b73)

[himdel]

Thanks for fixing this! :)

Long term, we really need that logic to come from providers, but, that's long term.

[AparnaKarve]

@himdel Thanks - could not agree more!