CRM-20158, added function to update credit card details like card type and pan trunc...

 CRM-20158, added function to update credit card details like card type and pan truncation for contribution

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* CRM-20158: Store card type and last 4 digits of credit card
  https://issues.civicrm.org/jira/browse/CRM-20158

CRM-20158, added test

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* CRM-20158: Store card type and last 4 digits of credit card
  https://issues.civicrm.org/jira/browse/CRM-20158

CRM-20158, changed code to use api for update to financial trxn table and to retrieve data from financial trxn table

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* CRM-20158: Store card type and last 4 digits of credit card
  https://issues.civicrm.org/jira/browse/CRM-20158

CRM-20158, placed function contribution BAO to update card details

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* CRM-20158: Store card type and last 4 digits of credit card
  https://issues.civicrm.org/jira/browse/CRM-20158

CRM-20158, changed function defination and params and updated function calling

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* CRM-20158: Store card type and last 4 digits of credit card
  https://issues.civicrm.org/jira/browse/CRM-20158