(PUP-11621) Move Hiera 3 to Gemfile features group

Author: mhashizume

Gemfile

@@ -14,12 +14,12 @@ end
 
 # override .gemspec deps - may issue warning depending on Bundler version
 gem "facter", :git => 'https://github.com/puppetlabs/facter'
-gem "hiera", *location_for(ENV['HIERA_LOCATION']) if ENV.has_key?('HIERA_LOCATION')
 gem "semantic_puppet", *location_for(ENV['SEMANTIC_PUPPET_LOCATION'] || ["~> 1.0"])
 gem "puppet-resource_api", *location_for(ENV['RESOURCE_API_LOCATION'] || ["~> 1.5"])
 
 group(:features) do
   gem 'diff-lcs', '~> 1.3', require: false
+  gem "hiera", *location_for(ENV['HIERA_LOCATION']) if ENV.has_key?('HIERA_LOCATION')
   gem 'hiera-eyaml', *location_for(ENV['HIERA_EYAML_LOCATION'])
   gem 'hocon', '~> 1.0', require: false
   # requires native libshadow headers/libs