Fix "Storage Pods" string in GTL settings

[mzazrivec]

storage_pod is incorrect table name, correct should be: container_group

https://bugzilla.redhat.com/show_bug.cgi?id=1337558

[simon3z]

@lgalis can you review this? If I am not mistaken it was introduced in #8004.

Also, @mzazrivec @lgalis I see that storage_pod was used in many more parts of the code in #8004, it's worth reviewing if we need other changes (if you haven't done it already).

Can anyone please add a screenshot too? Thanks.

[mzazrivec]

@simon3z This is the only occurrence in our code where we call ui_lookup() with
the argument :tables => storage_pod (or :tables => storage_pods).

This is incorrect, since:

1. there is no such table in our schema and the record storage_pod is not present in
   our catalog of tables (and pretty, human readable strings). What this means that
   this part would not be translated into other locales.
2. the part of ui, where we're using this construct is about settings preferred GTL type for
   a page showing container groups
3. we do have a record for container_groups in our catalog and is already translated.

This PR is about fixing just this.

[simon3z]

@simon3z This is the only occurrence in our code where we call ui_lookup() with
the argument :tables => storage_pod (or :tables => storage_pods).

OK 👍

@chessbyte I think this should be assigned to @dclarizio

@miq-bot assign @dclarizio

[miq-bot]

Checked commit mzazrivec@9a76852 with ruby 2.2.3, rubocop 0.37.2, and haml-lint 0.16.1
1 file checked, 0 offenses detected
Everything looks good. 🍰