Respect RBAC rules for physical server quadicon settings

[skateman]

When having a user without access to physical servers, it should not see the quadicon switch under My Settings.

Before:

After:

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1555400

@miq-bot add_label bug, gaprindashvili/yes

[miq-bot]

This pull request is not mergeable. Please rebase and repush.

[miq-bot]

Checked commit skateman@a49ce99 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.

[simaishi]

Gaprindashvili backport details:

$ git log -1
commit 4bb5f698aa7b8eb95f8d72b77d07b36b7896795d
Author: Milan Zázrivec <mzazrivec@redhat.com>
Date:   Thu Mar 15 13:48:50 2018 +0100

    Merge pull request #3625 from skateman/physical-server-rbac-quad
    
    Respect RBAC rules for physical server quadicon settings
    (cherry picked from commit e36308c72b246ee9606f677bfb9837a31f9e1ffc)
    
    Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1557400