Add spec test showing is_pe detection failure
user
```ruby
require 'spec_helper'

describe 'puppetdb::server', :type => :class do
  basefacts =
      {
        :osfamily                 => 'RedHat',
        :operatingsystem          => 'RedHat',
        :operatingsystemrelease   => '6.5',
        :fqdn                     => 'test.domain.local'
      }

  context 'on a supported platform' do
    let(:facts) do
      basefacts
    end

    it { should contain_class('puppetdb::server') }

    describe 'when not specifying JAVA_ARGS' do
      it { should_not contain_ini_subsetting('Xms') }
    end

    describe 'when specifying JAVA_ARGS' do
      let(:params) do
        {
          'java_args' => {
            '-Xms' => '2g',
          }
        }
      end

      context 'on standard PuppetDB' do
        it { should contain_ini_subsetting("'-Xms'").
        with(
          'ensure'            => 'present',
          'path'              => '/etc/sysconfig/puppetdb',
          'section'           => '',
          'key_val_separator' => '=',
          'setting'           => 'JAVA_ARGS',
          'subsetting'        => '-Xms',
          'value'             => '2g'
        )}
      end

      context 'on PE PuppetDB' do
        let(:facts) do
          basefacts.merge({
            :is_pe => 'true',
          })
        end
        it { should contain_ini_subsetting("'-Xms'").
        with(
          'ensure'            => 'present',
          'path'              => '/etc/sysconfig/pe-puppetdb',
          'section'           => '',
          'key_val_separator' => '=',
          'setting'           => 'JAVA_ARGS',
          'subsetting'        => '-Xms',
          'value'             => '2g'
        )}
      end

    end
  end
end
```
assistant