Foreman » Installer

Refs #31964 - Introduce foreman::to_symbolized_yaml

This function symbolizes keys in YAML which is typically what Foreman
config files use. This is hard to achieve with pure Puppet so a Ruby
function is used.

Fixes #30284 - Improve smartproxy registration failure error messages

Add request_uri(path) helper to Foreman resource

Remove mention of Ruby 1.8 in a comment

Ruby 1.8 is long dead and nobody needs to be reminded of those days.

Correct indenting

Fix deprecation warning for URI.escape

Ruby 2.7 deprecated URI.escape.

Correct casing on Stdlib::HTTPUrl

While Puppet is case insensitive on data types, Kafo does care. This
matches the type to its actual definition.

Implement a foreman::enc function

This makes it possible to use Foreman as an ENC to your environment via
Hiera lookups.

Drop Puppet < 3.4 compatibility code

Clean up providers (#663)

- Remove JSON installation which is no longer needed since Ruby 1.9
- Remove apipie-based providers
- Remove the foreman_hostgroup type since there's no more provider