Changes for github_changelog_generator Raketask

 - Added github_site for remote server
 - Added github_endpoint for remote server
 - Added gitlab for preparation of gitlab support added in (github-changelog-generator/github-changelog-generator#657)

 These settings will not be added by default. Only if added to .sync.yml
 They allow for GitHub Enterprise and Gitlab options down the road.

moduleroot/Rakefile.erb

@@ -77,6 +77,15 @@ PuppetLint.configuration.send('<%= option %>')
 if Bundler.rubygems.find_name('github_changelog_generator').any?
  GitHubChangelogGenerator::RakeTask.new :changelog do |config|
  raise "Set CHANGELOG_GITHUB_TOKEN environment variable eg 'export CHANGELOG_GITHUB_TOKEN=valid_token_here'" if Rake.application.top_level_tasks.include? "changelog" and ENV['CHANGELOG_GITHUB_TOKEN'].nil?
+<% if @configs['github_site'] -%>
+ config.github_site = <%= @configs['github_site'].inspect %>
+<% end -%>
+<% if @configs['github_endpoint'] -%>
+ config.github_endpoint = <%= @configs['github_endpoint'].inspect %>
+<% end -%>
+<% if @configs['gitlab'] -%>
+ config.gitlab = <%= @configs['gitlab'].inspect %>
+<% end -%>
  config.user = "#{changelog_user}"
  config.project = "#{changelog_project}"
 <% if @configs['changelog_since_tag'] -%>