Updated rspec to transitory 2.99 to 3.0
Convert specs to RSpec 2.99.0 syntax with Transpec

This conversion is done by Transpec 2.2.1 with the following command:
    transpec

* 50 conversions
    from: obj.should
      to: expect(obj).to

* 9 conversions
    from: describe 'some model' { }
      to: describe 'some model', :type => :model { }

* 4 conversions
    from: be_false
      to: be_falsey

* 3 conversions
    from: it { should ... }
      to: it { is_expected.to ... }

* 2 conversions
    from: be_true
      to: be_truthy

For more details: https://github.com/yujinakayama/transpec#supported-conversions
Updated rspec to 3.0
rails_helper.rb for specs