Set OTRS customer in account registration mail.

Uses EmailMessage object isntead of send_mail shortcut.

ticdesk_account/views.py

 from django.contrib import auth
-from django.core.mail import mail_admins, send_mail
+from django.core.mail import EmailMessage
 from django.http import HttpResponse
 from django.shortcuts import redirect, render
 from django.utils.translation import ugettext as _
@@ -107,8 +107,15 @@ def register(request):
                     person.subscribe_newsletter(register_form.cleaned_data['newsletter'])
 
                 # E-mail user and admins
-                subject = _('Teckids-Account %s angelegt') % register_form.cleaned_data['uid']
-                body = _("""
+                message = EmailMessage()
+                message.reply_to = ['root@teckids.org']
+                message.to = [register_form.cleaned_data['mail']]
+                message.cc = ['root@teckids.org']
+                message.subject = _('Teckids-Account %s angelegt') % register_form.cleaned_data['uid']
+                message.extra_headers = {
+                    'X-OTRS-CustomerUser': register_form.cleaned_data['uid']
+                }
+                message.body = _("""
 Hallo %s,
 
 dein Teckids-Account mit dem Benutzernamen %s wurde angelegt.
@@ -122,8 +129,7 @@ verein@teckids.org.
 Viel Spaß,
 dein Teckids-Team
 """) % (register_form.cleaned_data['given_name'], register_form.cleaned_data['uid'])
-                send_mail(subject, body, "Teckids e.V. <verein@teckids.org>", [register_form.cleaned_data['mail']])
-                mail_admins(subject, body)
+                message.send()
             
                 context['registered'] = True