Fixes #12294 - Update existing params using API

Refs #15779 - make background processing unavailable for now (#4217)

The original PR got vetted in the packaging phase and including
foreman-task as dependency of Foreman was refused. We need to rethink
our approach for getting the foreman-tasks functionality available...

Refs #17653 - fix typo in show_hidden_parameters and add tests

Refs #17653 - add show_hidden to apidoc

Fixes #6502 - List ignored classes and environments on import

When importing environments and classes from puppet, ignored
environments and classes defined in ignored_environments.yml
aren't aparent.

This will add them to the list to import as ignored and...

Fixes #15779 - make background processing available

Fixes #17343 - set deep munge config off

deep_munge was introduced as a solution to keep
Rails secure by default which results in
'empty array becomes nil in params'.
Thats why, set deep_munge config off in application.rb.
Also, added changes which will cast param argument to string...

fixes #16798 - move scoped_search definitions to STI subclasses

scoped_search doesn't support class inheritance with STI, so registering
definitions on the subclass fixes various issues. This fixes an issue
where scoped_search on CommonParameter calls Parameter.all and is...

Fixes #17104 - ignore resource via API

Fixes #15703 - Singularize media in api doc for orgs