Add Gemfile and puppet 4 checks

In anticipation of puppet 4, start trying to deal with puppet 4 things
that can be helpfully predicted by puppet lint plugins.

Change-Id: Id272e95c5f93e07b5ab7791badc635eb066c6763
Co-Authored-By: Colleen Murphy <colleen@gazlene.net>
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

.gitignore

@@ -0,0 +1,2 @@
+Gemfile.lock
+.bundled_gems/

Gemfile

@@ -0,0 +1,31 @@
+source 'https://rubygems.org'
+
+group :development, :test do
+  gem 'puppetlabs_spec_helper', :require => false
+
+  gem 'metadata-json-lint'
+  # This is nice and all, but let's not worry about it until we've actually
+  # got puppet 4.x sorted
+  # gem 'puppet-lint-param-docs'
+  gem 'puppet-lint-absolute_classname-check'
+  gem 'puppet-lint-absolute_template_path'
+  gem 'puppet-lint-trailing_newline-check'
+
+  # Puppet 4.x related lint checks
+  gem 'puppet-lint-unquoted_string-check'
+  gem 'puppet-lint-empty_string-check'
+  gem 'puppet-lint-leading_zero-check'
+  gem 'puppet-lint-variable_contains_upcase'
+  gem 'puppet-lint-numericvariable'
+  gem 'puppet-lint-spaceship_operator_without_tag-check'
+  gem 'puppet-lint-undef_in_function-check'
+
+  if puppetversion = ENV['PUPPET_GEM_VERSION']
+    gem 'puppet', puppetversion, :require => false
+  else
+    gem 'puppet', '~> 3.0', :require => false
+  end
+
+end
+
+# vim:ft=ruby

manifests/init.pp

@@ -2,12 +2,12 @@ class exim(
   $mailman_domains = [],
   $queue_interval = '30m',
   $queue_run_max = '5',
-  $queue_smtp_domains = '',
+  $queue_smtp_domains = undef,
   $smarthost = false,
   $sysadmins = []
 ) {
 
-  include exim::params
+  include ::exim::params
 
   package { $::exim::params::package:
     ensure => present,
@@ -40,13 +40,14 @@ class exim(
     }
   }
 
-  service { 'exim':
-    ensure      => running,
-    name        => $::exim::params::service_name,
-    hasrestart  => true,
-    subscribe   => [File[$::exim::params::config_file],
-                    File[$::exim::params::sysdefault_file]],
-    require     => Package[$::exim::params::package],
+  service { $::exim::params::service_name:
+    ensure     => running,
+    hasrestart => true,
+    subscribe  => [
+      File[$::exim::params::config_file],
+      File[$::exim::params::sysdefault_file],
+    ],
+    require    => Package[$::exim::params::package],
   }
 
   file { $::exim::params::config_file: