Update gems to support testing Puppet 8

.gitignore

@@ -29,7 +29,8 @@ vendor/
 .ruby-*
 
 ## rspec
-spec/fixtures/
+spec/fixtures/manifests
+spec/fixtures/modules
 junit/
 
 ## Puppet module

CONTRIBUTING.md

@@ -194,7 +194,7 @@ More filter info available [here](https://relishapp.com/rspec/rspec-core/v/3-9/d
 To run OS specific tests:
 
 ```shell
-SPEC_FACTS_OS=redhat-7-x86_64 bundle exec rspec spec/classes/foreman_spec.rb
+SPEC_FACTS_OS=redhat-8-x86_64 bundle exec rspec spec/classes/foreman_spec.rb
 ```
 
 If you have more than one version of `redhat` OS specified in metadata.json,

Gemfile

@@ -3,24 +3,16 @@
 
 source 'https://rubygems.org'
 
-gem 'puppet', ENV['PUPPET_GEM_VERSION'] || '>= 5.5', groups: ['development', 'test']
+gem 'puppet', ENV.fetch('PUPPET_GEM_VERSION', '>= 7'), groups: ['development', 'test']
 gem 'rake'
 
 gem 'kafo_module_lint', {"groups"=>["test"]}
-gem 'puppet-lint-empty_string-check', {"groups"=>["test"]}
-gem 'puppet-lint-file_ensure-check', {"groups"=>["test"]}
-gem 'puppet-lint-param-docs', '>= 1.3.0', {"groups"=>["test"]}
-gem 'puppet-lint-spaceship_operator_without_tag-check', {"groups"=>["test"]}
-gem 'puppet-lint-strict_indent-check', {"groups"=>["test"]}
-gem 'puppet-lint-undef_in_function-check', {"groups"=>["test"]}
-gem 'voxpupuli-test', '~> 5.0', {"groups"=>["test"]}
+gem 'puppet-lint-spaceship_operator_without_tag-check', '~> 1.0', {"groups"=>["test"]}
+gem 'voxpupuli-test', '~> 7.0', {"groups"=>["test"]}
 gem 'github_changelog_generator', '>= 1.15.0', {"groups"=>["development"]}
-gem 'puppet_metadata', '~> 1.3'
+gem 'puppet_metadata', '~> 3.0'
 gem 'puppet-blacksmith', '>= 6.0.0', {"groups"=>["development"]}
-gem 'voxpupuli-acceptance', '~> 1.0', {"groups"=>["system_tests"]}
+gem 'voxpupuli-acceptance', '~> 2.0', {"groups"=>["system_tests"]}
 gem 'puppetlabs_spec_helper', {"groups"=>["system_tests"]}
 
-# Pin rdoc to prevent updating bundled psych (https://github.com/ruby/rdoc/commit/ebe185c8775b2afe844eb3da6fa78adaa79e29a4)
-gem 'rdoc', '< 6.4'
-
 # vim:ft=ruby