Add parent class name to additional options for report data

[karelhala]

Fixes #2632

Parent is not all the times just class from which /report_data was called, so send parent_class_name as well so we can query for more specific items.

[karelhala]

@martinpovolny I am not sure if function from_additional_options is good, can you look at it and maybe propose some better thing?

@miq-bot add_label GTLs, gaprindashvili/yes, bug

[miq-bot]

@karelhala Cannot apply the following label because they are not recognized: gtls

[martinpovolny]

Code looks good. Any volunteer to test this? We need to click throught the different GTL usecases with this PR merged.

@AparnaKarve, @lgalis, @h-kataria, @mzazrivec, @ZitaNemeckova ?

@karelhala : from the security perspective I am not happy we are constantizing any value that comes from the input and then calling find on it. Maybe we could at least check that the class is a subclass of ActiveRecord::Base?

[h-kataria]

@martinpovolny i will try to test that out in UI, additional set of testing is always good.

[miq-bot]

Checked commit karelhala@f2ea405 with ruby 2.3.3, rubocop 0.47.1, and haml-lint 0.20.0
2 files checked, 0 offenses detected
Everything looks fine. ⭐

[h-kataria]

@martinpovolny tested in UI so far looks good.

[martinpovolny]

Thx!

[simaishi]

Gaprindashvili backport details:

$ git log -1
commit cfacf25d6600a573608636b5e0ba32dd29beff74
Author: Martin Povolny <mpovolny@redhat.com>
Date:   Tue Nov 7 20:40:42 2017 +0100

    Merge pull request #2640 from karelhala/gtlAddParentClassName
    
    Add parent class name to additional options for report data
    (cherry picked from commit 62562b696421856681c037bbd5ba697cd15732da)