[FIX] payment_stripe: preventDefault

When a user uses Strip and clicks on "Pay & Confirm", a "Bad Request"
error can pop-up. This is because it tries to reload the page, while it
should only display the Strip pop-up.

This is simply due to a `preventDefault` done after the event is
performed, and not before.

opw-692341

addons/payment_stripe/static/src/js/stripe.js

@@ -47,6 +47,7 @@ odoo.define('payment_stripe.stripe', function(require) {
             return false;
         }
 
+        e.preventDefault();
         ajax.jsonRpc('/shop/payment/transaction/' + acquirer_id, 'call', {}).then(function (data) {
             $form.html(data);
             handler.open({
@@ -55,7 +56,6 @@ odoo.define('payment_stripe.stripe', function(require) {
                 currency: $("input[name='currency']").val(),
                 amount: $("input[name='amount']").val()*100
             });
-            e.preventDefault();
         });
 
     });