Add RedHat support

RedHat 7 is excluded because the UBI yum repos are unable to resolve
all EPEL dependencies (try installing nginx from epel).

lib/puppet_metadata/beaker.rb

@@ -19,6 +19,7 @@ class Beaker
  # unit files
  PIDFILE_INCOMPATIBLE = {
  'CentOS' => ['8'],
+ 'RedHat' => ['8'],
  'AlmaLinux' => ['8'],
  'OracleLinux' => ['7', '8'],
  'Rocky' => ['8'],
@@ -59,7 +60,7 @@ def adjusted_os(os)
  # @return [nil] If no setfile is available
  # @return [Array<(String, String)>] The beaker setfile description with a readable name
  def os_release_to_setfile(os, release, use_fqdn: false, pidfile_workaround: false, domain: nil, puppet_version: nil)
- return unless os_supported?(os)
+ return unless os_supported?(os, release)
 
  aos = adjusted_os(os)
 
@@ -87,8 +88,14 @@ def os_release_to_setfile(os, release, use_fqdn: false, pidfile_workaround: fals
 
  # Return whether a Beaker setfile can be generated for the given OS
  # @param [String] os The operating system
- def os_supported?(os)
- %w[Archlinux CentOS Fedora Debian Ubuntu Rocky AlmaLinux OracleLinux].include?(os)
+ # @param [String] release The operating system release
+ def os_supported?(os, release = nil)
+ case os
+ when 'RedHat'
+ true if release !~ /^7/
+ when /^(Archlinux|CentOS|Fedora|Debian|Ubuntu|Rocky|AlmaLinux|OracleLinux)/
+ true
+ end
  end
 
  private