misc: change welco description and default slug to be about mails (#33702)

hobo/environment/migrations/0008_auto_20151021_1414.py

@@ -33,6 +33,6 @@ class Migration(migrations.Migration):
         ),
         migrations.AlterModelOptions(
             name='welco',
-            options={'ordering': ['title'], 'verbose_name': 'Welco Multichannel Home'},
+            options={'ordering': ['title'], 'verbose_name': 'Welco Mail Channel'},
         ),
     ]

hobo/environment/models.py

@@ -342,13 +342,13 @@ class Fargo(ServiceBase):
 
 class Welco(ServiceBase):
     class Meta:
-        verbose_name = _('Welco Multichannel Home')
+        verbose_name = _('Welco Mail Channel')
         ordering = ['title']
 
     class Extra:
         service_id = 'welco'
         service_label = 'Welco'
-        service_default_slug = 'accueil'
+        service_default_slug = 'courrier'
 
     def get_admin_zones(self):
         return [