Fixes Azure Instance container display of file name and mode descriptions

[GregP]

Fixes display of container hard drive filename and mode descriptions for Azure Instances, as well as other providers. Code now accounts for when values/settings are either nil or blank (text) strings. All hard drive parameters were shifted to display in the right hand column on the page for display consistency and viewing legibility. See screen shots bellow.

https://bugzilla.redhat.com/show_bug.cgi?id=1536681

Screen shot before code fix:

Screen shot of Azure Instance post code fix:

Screen shot of Amazon Instance display post fix:

Screen shot of OpenStack Instance display post code fix, notice 2 hard drives listed:

[Loicavenel]

I really don't get the fix here, it seems for me the content form left column should be in right column.

[GregP]

@Loicavenel I originally only addressed the BZ. Code has been refactored to make the page and hard drive params more legible.

[GregP]

@h-kataria Please review.

[mzazrivec]

The two CI failures undefined method 'upcase' for nil:NilClass are related.

[h-kataria]

@GregP please look at test failures they look related to code changes

[miq-bot]

Checked commit GregP@bb55ae0 with ruby 2.3.3, rubocop 0.52.0, haml-lint 0.20.0, and yamllint 1.10.0
2 files checked, 0 offenses detected
Everything looks fine. 🍪

[GregP]

@h-kataria Spec refactored/amended and added, please review.

[simaishi]

Gaprindashvili backport details:

$ git log -1
commit 2ce29f77462c09492de7aa8f4b999d3cb362c8af
Author: Milan Zázrivec <[email protected]>
Date:   Thu Feb 8 12:40:54 2018 +0100

    Merge pull request #3373 from GregP/fix_azure_provider_description
    
    Fixes Azure Instance container display of file name and mode descriptions
    (cherry picked from commit 7a41058cedd42be52001fb372681386c9d5d072e)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1552886

[simaishi]

@GregP This was refactored in master branch and I'm not sure where this goes in Fine branch... Please create a separate PR.