Astakos feedback form fixes

- Include uuid in email
- Response redirect after on successful form submission

snf-astakos-app/astakos/im/templates/im/feedback_mail.txt

 Feedback message:
-{{ message|safe }}
+{{ message }}
 
 User info:
-ID: {{ user.id }}
-Email: {{ user.username }}
+UUID: {{ user.uuid }}
+Email: {{ user.email }}
 
 User application data:
-{{ data|safe }}
+{{ data }}
 

snf-astakos-app/astakos/im/views.py

@@ -614,6 +614,7 @@ def feedback(request, template_name='im/feedback.html', email_template_name='im/
             else:
                 message = _(astakos_messages.FEEDBACK_SENT)
                 messages.success(request, message)
+            return HttpResponseRedirect(reverse('feedback'))
     return render_response(template_name,
                            feedback_form=form,
                            context_instance=get_context(request, extra_context))