Bump to et_rails_app 5.1.4
Bring test/config files up-to-date w/ other cookbooks
RuboCop cleanup
Convert Serverspecs to RSpec 3.0.2 syntax with Transpec

This conversion is done by Transpec 2.2.4 with the following command:
    transpec -f test/integration/default/serverspec/

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

* 2 conversions
    from: its(:attr) { }
      to: describe '#attr' do subject { super().attr }; it { } end

For more details: https://github.com/yujinakayama/transpec#supported-conversions
Convert ChefSpec specs to RSpec 3.0.2 syntax with Transpec

This conversion is done by Transpec 2.2.4 with the following command:
    transpec

* 4 conversions
    from: obj.stub(:message)
      to: allow(obj).to receive(:message)

For more details: https://github.com/yujinakayama/transpec#supported-conversions
Add missing command stub to ChefSpec tests
Clean up CHANGELOG syntax