[action] add ObtainCreditCardAction and forms for it.
fix tests, add new
[form] add some unit tests for CreditCardType.
[form] add integration tests for credit_card_expiration_date type.
[form] add integration tests for credit card form.
[payment-factory] Add ability to disable obtain credit card feature. Add bool option `obtain_credit_card`
[doc] update simple purcahse examples using obtain_credit_card feature.
Merge pull request #134 from formapro-forks/obtain-credit-card

[WIP][action] add ObtainCreditCardAction and forms for it.