[Port] Handle case where anon order status view is not registered

Some sites may not include that URL and so we should swallow the
resolution exception to enable checkout to process as normal.

(cherry picked from commit 70ddc185b1)

Conflicts:
	oscar/apps/checkout/mixins.py

oscar/apps/checkout/mixins.py

 import logging
 
 from django.http import HttpResponseRedirect
-from django.core.urlresolvers import reverse
+from django.core.urlresolvers import reverse, NoReverseMatch
 from django.contrib.sites.models import Site, get_current_site
 from django.core.exceptions import ObjectDoesNotExist
 from django.db.models import get_model
                'lines': order.lines.all()}
 
         if not self.request.user.is_authenticated():
-            path = reverse('customer:anon-order',
-                           kwargs={'order_number': order.number,
-                                   'hash': order.verification_hash()})
-            site = Site.objects.get_current()
-            ctx['status_url'] = 'http://%s%s' % (site.domain, path)
+            # Attempt to add the anon order status URL to the email template
+            # ctx.
+            try:
+                path = reverse('customer:anon-order',
+                               kwargs={'order_number': order.number,
+                                       'hash': order.verification_hash()})
+            except NoReverseMatch:
+                # We don't care that much if we can't resolve the URL
+                pass
+            else:
+                site = Site.objects.get_current()
+                ctx['status_url'] = 'http://%s%s' % (site.domain, path)
 
         try:
             event_type = CommunicationEventType.objects.get(code=code)