Django 1.8 fails with an ImproperlyConfigured exception when `fields` or
`exclude` isn't set:

```
class Meta:
 fields = '__all__'
 ```

 on all descendents of ModelForm.

 Omitting this is deprecated in 1.7:

 https://docs.djangoproject.com/en/1.7/topics/forms/modelforms/#selecting-the-fields-to-use

Change-Id: I065883ce484bd3600b1cb664fd57e1eabb14416d
diff --git a/xos/admin.py b/xos/admin.py
index e372a7d..df73ebb 100644
--- a/xos/admin.py
+++ b/xos/admin.py
@@ -28,6 +28,7 @@
 
     class Meta:
         model = FabricService
+        fields = '__all__'
 
 class FabricServiceAdmin(ReadOnlyAwareAdmin):
     model = FabricService