resursbank-ecommerce

ECOMPHP-282:

* Moved out the url validation host check to own method (setRegisterCallbackAddressValidation), to make the register method smaller.
* Cleanup in digestData arrays so the controls are really separate. If no algorithm is set, the default will be sha1. This seems to have been forced earlier.
* Still making sure that the algorithms are requested in upper case.
* Now checking digestSalt properly.
* If no salt is set in the local method, the internal functions will fall back to two other global setups (like before, but working this time).
* Created tests to do all four variants.