Improve tests setup

- Add .fixtures.yaml to checkout common module
- Use puppetlabs-spec-helper in spec_helper.rb

.fixtures.yml

+fixtures:
+  repositories:
+    "common":
+      "repo": "https://gitlab.com/shared-puppet-modules-group/common.git"
+  symlinks:
+    "apt": "#{source_dir}"

Gemfile

@@ -2,8 +2,8 @@ source "https://rubygems.org"
 
 group :development, :unit_tests do
   gem "rake"
-  gem "rspec", '< 3.2.0'
-  gem "rspec-puppet"
+  gem "rspec-puppet", "~> 2.1", :require => false
+  gem "rspec-core", "3.1.7",    :require => false
   gem "puppetlabs_spec_helper"
   gem "metadata-json-lint"
   gem "rspec-puppet-facts"

spec/spec_helper.rb

 # https://puppetlabs.com/blog/testing-modules-in-the-puppet-forge
-require 'rspec-puppet'
-require 'mocha/api'
+require 'puppetlabs_spec_helper/module_spec_helper'
 
-RSpec.configure do |c|
+fixture_path = File.expand_path(File.join(__FILE__, '..', 'fixtures'))
 
-  c.module_path = File.expand_path(File.join(File.dirname(__FILE__), '..', '..'))
-  c.color = true
+RSpec.configure do |c|
 
-  #Puppet.features.stubs(:root? => true)
+  c.manifest_dir = File.join(fixture_path, 'manifests')
+  c.module_path  = File.join(fixture_path, 'modules')
 
+  c.color = true
 end