Bug 19007 - Allow paypal payments via debit or credit card again

A recent change in Paypal has removed the previous default option of paying via debit or credit card without an account. To bring this option back, we need to send an additional parameter to the PayPal API.

Test Plan:
1) Enable paypal for your Koha instance
2) Ensure you are not logged in to PayPal
3) Attempt to pay a fine via PayPal
4) Not the the "Pay with Debit or Credit Card" option is missing
5) Apply this patch
6) Refresh opac-account.pl
7) Attempt to make a payment via PayPal again
8) Note the option "Pay with Debit or Credit Card" is now available

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>

Signed-off-by: George Williams <gwilliams@nekls.org>
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit 10311769d4)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit 5a132e1c3f)
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>

opac/opac-account-pay.pl

@@ -96,6 +96,7 @@ if ( $payment_method eq 'paypal' ) {
         'PAYMENTREQUEST_0_PAYMENTACTION'        => 'Sale',
         'PAYMENTREQUEST_0_ALLOWEDPAYMENTMETHOD' => 'InstantPaymentOnly',
         'PAYMENTREQUEST_0_DESC'                 => C4::Context->preference('PayPalChargeDescription'),
+        'SOLUTIONTYPE'                          => 'Sole',
     };
 
     my $response = $ua->request( POST $url, $nvp_params );