Fix/create add card form signature - #59

'CreatePaymentRequest' is defined but never used. Allowed unused vars must match /^_/u

'CreateCitPaymentResponse' is defined but never used. Allowed unused vars must match /^_/u

'CreateCitPaymentRequest' is defined but never used. Allowed unused vars must match /^_/u

'CreateCitPaymentParams' is defined but never used. Allowed unused vars must match /^_/u

'AddCardFormResponse' is defined but never used. Allowed unused vars must match /^_/u

'AddCardFormRequest' is defined but never used. Allowed unused vars must match /^_/u

'IPaytrail' is defined but never used. Allowed unused vars must match /^_/u

'METHOD' is defined but never used. Allowed unused vars must match /^_/u

'API_ENDPOINT' is defined but never used. Allowed unused vars must match /^_/u

'responseStatus' is defined but never used. Allowed unused vars must match /^_/u

Replace `⏎······.spyOn(api.tokenPayments,·'createAddCardFormRequest')⏎······` with `.spyOn(api.tokenPayments,·'createAddCardFormRequest')`

Delete `⏎`

Replace `⏎········'https://services.paytrail.com/tokenization/addcard-form',⏎········body,⏎········{·headers·}⏎······` with `'https://services.paytrail.com/tokenization/addcard-form',·body,·{·headers·}`

Replace `⏎····.createHmac('sha256',·secretKey)⏎····.update(payload)⏎····` with `.createHmac('sha256',·secretKey).update(payload)`

Replace `⏎····method,⏎····url,⏎····body,⏎····sortedHeaders⏎··` with `method,·url,·body,·sortedHeaders`

Replace `key` with `(key)`

Replace `key` with `(key)`

Delete `⏎`

Replace `⏎······'POST',⏎······'/tokenization/addcard-form',⏎······body,⏎······headers,⏎······this.secretKey⏎····` with `'POST',·'/tokenization/addcard-form',·body,·headers,·this.secretKey`