Update to rspec 2.99.0.rc1 and fix more deprecations
Convert specs to RSpec 2.99.0.rc1 syntax with Transpec

(In addition to the autoconvert, fix a missing test matcher
in races_controller_spec.rb found after conversion.)

This conversion is done by Transpec 2.0.0 with the following command:
    transpec

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

* 64 conversions
    from: == expected
      to: eq(expected)

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

* 11 conversions
    from: describe 'some controller' { }
      to: describe 'some controller', :type => :controller { }

* 10 conversions
    from: obj.should_receive(:message)
      to: expect(obj).to receive(:message)

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

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

* 3 conversions
    from: describe 'some feature' { }
      to: describe 'some feature', :type => :feature { }

* 3 conversions
    from: describe 'some view' { }
      to: describe 'some view', :type => :view { }

* 2 conversions
    from: describe 'some helper' { }
      to: describe 'some helper', :type => :helper { }

* 2 conversions
    from: obj.should_not_receive(:message)
      to: expect(obj).not_to receive(:message)

See also: https://github.com/yujinakayama/transpec#supported-conversions
Update to rspec 3.0.0.rc1; remove fuubar formatter