Make stats_controller_spec.rb aware of timezones

stats_controller_spec.rb

context 'events present' do
  let(:time_1) { DateTime.parse("2015-01-01").in_time_zone }
  let(:time_2) { DateTime.parse("2015-01-02").in_time_zone }
  let(:time_3) { DateTime.parse("2015-01-03").in_time_zone }

  before do
    create :ahoy_event, name: 'foo', time: time_1
    create :ahoy_event, name: 'foo', time: time_1
    create :ahoy_event, name: 'foo', time: time_2
    create :ahoy_event, name: 'bar', time: time_1
    create :ahoy_event, name: 'bar', time: time_3
    create :ahoy_event, name: 'bar', time: time_3
  end

  it 'returns single events formated for working with c3.js' do
    sign_in user
    get :show, event: 'foo'

    expect(response).to be_ok

    data = JSON.parse(response.body)

    date_1 = I18n.l(time_1.to_date)
    date_2 = I18n.l(time_2.to_date)

    expect(data).to eq "x" => [date_1, date_2], "Foo" => [2, 1]
  end
end