Update Receipt page

ECOM-4559

lms/djangoapps/commerce/views.py

@@ -65,6 +65,7 @@ def checkout_receipt(request):
             "If your course does not appear on your dashboard, contact {payment_support_link}."
         ).format(payment_support_link=payment_support_link)
 
+    user = request.user
     context = {
         'page_title': page_title,
         'is_payment_complete': is_payment_complete,
@@ -74,7 +75,8 @@ def checkout_receipt(request):
         'error_text': error_text,
         'for_help_text': for_help_text,
         'payment_support_email': payment_support_email,
-        'username': request.user.username,
+        'username': user.username,
+        'full_name': user.get_full_name(),
         'nav_hidden': True,
         'is_request_in_themed_site': is_request_in_themed_site()
     }

lms/templates/commerce/receipt.underscore

@@ -2,7 +2,7 @@
   <article class="content-main">
     <h3 class="title">
       <%= interpolate(
-            gettext( "Thank you! We have received your payment for %(course_name)s."),
+            gettext( "Thank you %(full_name)! We have received your payment for %(course_name)s."),
             { course_name: "<span class='course_name_placeholder'></span>" }, true
           ) %>
     </h3>