Prevent Donors from Using the CC# as a Name
Additional changes to DataValidator

Runs a donors first/last name through a Luhn check to prevent
them from entering a credit card number in this field.

Change-Id: I6f22aef2a27ca665a14ec6b2513962fb7921a9fd
Merge "Prevent Donors from Using the CC# as a Name Additional changes to DataValidator"