Enable future parser testing

rspec-puppet#183 was merged and released in 2.0, so we can now take
advantage of the future parser.

lib/puppetlabs_spec_helper/module_spec_helper.rb

@@ -21,8 +21,8 @@ def verify_contents(subject, title, expected_lines)
 RSpec.configure do |c|
   c.module_path = module_path
   c.manifest_dir = File.join(fixture_path, 'manifests')
-  ## These depend on rspec-puppet #209 and #183 being released
-  #c.parser = 'future' if ENV['FUTURE_PARSER'] == 'yes'
+  c.parser = 'future' if ENV['FUTURE_PARSER'] == 'yes'
+  ## This depends on rspec-puppet #209 being released
   #c.strict_variables = true if ENV['STRICT_VARIABLES'] == 'yes'
   ## These depend on rspec-puppet #212 being released
   #c.stringify_facts = false if ENV['STRINGIFY_FACTS'] == 'no'