Add scenarios to cards feature

https://github.com/balanced/balanced-api/blob/revision1/scenarios/cards/add_to_customer.yml
https://github.com/balanced/balanced-api/blob/revision1/scenarios/cards/avs_postal_match.yml
https://github.com/balanced/balanced-api/blob/revision1/scenarios/cards/avs_street_match.yml
https://github.com/balanced/balanced-api/blob/revision1/scenarios/cards/card_brand.yml
https://github.com/balanced/balanced-api/blob/revision1/scenarios/cards/card_tokenization.yml
https://github.com/balanced/balanced-api/blob/revision1/scenarios/cards/cvv_match.yml