Create RSpec metadata

The [VCR](https://relishapp.com/vcr/vcr/v/2-8-0/docs) uses a API that is possible move the block syntax to a [RSpec metadata](https://relishapp.com/vcr/vcr/v/2-8-0/docs/test-frameworks/usage-with-rspec-metadata).

This

```ruby
it 'my spec' do
  VCR.use_cassette('synopsis') do
    # code here
  end
end
```
became

```ruby
it 'my spec', vcr: { cassette_name: 'synopsis' } do
  # code here
end
```

I added the same behavior on Climate Control. So this

```ruby
ClimateControl.modify CONFIRMATION_INSTRUCTIONS_BCC: 'confirmation_bcc@example.com' do
  sign_up_as 'john@example.com'
  confirm_account_for_email 'john@example.com'
  current_email.should bcc_to('confirmation_bcc@example.com')
end
```

became

```ruby
it 'have the correct current_email', climate_control: { CONFIRMATION_INSTRUCTIONS_BCC: 'confirmation_bcc@example.com' } do
  sign_up_as 'john@example.com'
  confirm_account_for_email 'john@example.com'
  current_email.should bcc_to('confirmation_bcc@example.com')
end
```