[Pki-devel] [PATCH] 437 Refactored TPS authenticators.

The TPS authenticators has been modified to use PATCH for update operation as required by Backbone. The AuthenticatorData class has been modified to accept null properties to indicate that the properties are not being updated. The AuthenticatorModel class has been modified to use JSON data type for enable and disable operations. Ticket #654 -- Endi S. Dewata