URLC notifications not accepted if the user changes his email on dotPay site

[lklimek]

When users' e-mail does not match e-mail address from order, URLC notifications don't work.
Using latest 2.0.2 release.

Steps to reproduce:

1. Configure dotpay payment method rule as follows:

• fill in seller ID and PIN with data from test service
• set test mode to on
• dotpay widget disabled
• all other options - disabled or empty

2. Place new order with e-mail "me@somedomain.com"
3. Select payment with dotPay
4. Drupal creates redirect to dotPay website; in my case, selected payment method is "mBank mTransfer" and you can fill in personal data: first name (it's empty), last name (it's empty), e-mail

POST request is sent to https://ssl.dotpay.pl/test_payment/ ; request parameters (anonymized):
id: xxxxxx
amount:10.00
currency:PLN
control:173
description:Order 173
lang:pl
URL:http://some.url/dotpay/173/back
URLC:http://some.url/dotpay/confirm
type:0
ch_lock:0
api_version:dev
email:pawel@somewhere.com
bylaw:1
personal_data:1
p_info:some.url
chk:75c16.................

5. Fill in first name, last name and change email to "lukasz@somewhere.com" (or any other value).
6. Click "Pay"
7. Click "Accept"
8. Click "Next".
9. DotPay displays: Payment result: completed. Click "back to shop".
10. Browser goes back to Drupal ( /dotpay/173/back?status=OK ). It displays "Payment wait for confirmation by Dotpay"
11. Wait until you'll get timeout ("Timeout of waiting for confirmation of payment")
12. Go to dotPay admin panel and check the order there. You'll see that URLC has failed with "DrupalCommerce - FAIL EMAIL"

[tbajorek]

Please to try it now, after last commit.

[lklimek]

Works for me in the last release.