Convert specs to RSpec 2.14.7 syntax with Transpec

This conversion is done by Transpec 1.10.4 with the following command:
    transpec

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

* 32 conversions
    from: obj.should_not
      to: expect(obj).not_to

* 14 conversions
    from: lambda { }.should
      to: expect { }.to

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

* 3 conversions
    from: lambda { }.should_not
      to: expect { }.not_to

* 1 conversion
    from: obj.stub!(:message)
      to: allow(obj).to receive(:message)

* 1 conversion
    from: obj.should_receive(:message)
      to: expect(obj).to receive(:message)
Fix Rubocop violation introduced by transpec
Merge pull request #142 from petergoldstein/feature/run_transpec

Run transpec to update rspec syntax