FIX: dav_submission: timezone parsing error with CEST

The timezone within metadata.txt will now be written as Europe/Berlin instead of CET or CEST,
because pytz does not recognize CEST and thus will raise an UnknownTimezoneError.

dav_submission/views.py

@@ -63,7 +63,7 @@ class ListView(generic.ListView):
                     if mo is not None:
                         metadata['group'] = mo.group(1)
                         continue
-                    mo = re.match(r'^Datum: ([0-9]{2}.[0-9]{2}.[0-9]{4}) ([0-9]{2}:[0-9]{2}:[0-9]{2}) (.*)$', line)
+                    mo = re.match(r'^Datum: ([0-9]{2}.[0-9]{2}.[0-9]{4}) ([0-9]{2}:[0-9]{2}:[0-9]{2})[\s]*(.*)$', line)
                     if mo is not None:
                         date_str = mo.group(1)
                         time_str = mo.group(2)
@@ -226,7 +226,7 @@ Beschreibung:
 """
             metadata_format_kwargs = {
                 'date': timezone.localtime(now).strftime('%d.%m.%Y'),
-                'time': timezone.localtime(now).strftime('%H:%M:%S %Z'),
+                'time': timezone.localtime(now).strftime('%H:%M:%S') + ' ' + timezone.get_current_timezone_name(),
                 'name': form.cleaned_data['name'],
                 'email_address': form.cleaned_data['email_address'],
                 'group': form.cleaned_data['group'],