MAG2: Code maintenance. Renaming class 'PaymentCcTokenBuilder' to 'CreditCardBuilder'.

[guzzilar]

1. Objective

Regarding to the coming 'save-card' feature.
There will be a condition where the card's value will be assigned either as a 'token' or as a 'card_id' depending on what buyer choose from the front-end.
Meaning that, 'PaymentCcTokenBuilder' name will not reflect with the above condition

So here, I think to rename this class to make it conform with its functionality is important one.

Note. Originally, this class has been designed to only serve for 'card = token_id' purpose (we didn't design this class to support save card feature) therefore we need to update it.

2. Description of change

• Simply renaming class name.

3. Quality assurance

🔧 Environments:

• Platform version: Magento CE 2.2.3
• PHP version: 7.1.16.

✏️ Details:

• Make sure that we can still create a charge using credit card payment method.
  Tested. It works.

4. Impact of the change

• If you have already installed Omise-Magento, you are going to need to at least, flush the store cache (there is a change in an xml file in this PR).
• If there is any problem during the check out after flushing your store's cache. Try run composer dump-autoload from the root folder of your Magento directory.

5. Priority of change

Normal

6. Additional Notes

• This one should me merged before PR MAG2x: Add a capability to remember user's credit card and use it for a second-time purchase #123.

[jacstn]

cool... thanks!