Remove maintenance mode code
Remove more code that dont make sense for deis
According to https://github.com/deis/deis/blob/067e5d43b4e2b81da26d3146f67e91226502dde9/client/deis.py#L473 we will always use ssh://git@..., theres no need to specify the full path to the host
Lock rspec to ~> 3.1.0
Convert specs to RSpec 3.1.3 syntax with Transpec

This conversion is done by Transpec 2.3.7 with the following command:
    transpec

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

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

* 6 conversions
    from: be_false
      to: be_falsey

* 6 conversions
    from: be_true
      to: be_truthy

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

* 2 conversions
    from: Klass.any_instance.stub(:message)
      to: allow_any_instance_of(Klass).to receive(:message)

* 1 conversion
    from: == expected
      to: eq(expected)

For more details: https://github.com/yujinakayama/transpec#supported-conversions