core: cleanup provider select

passbook/core/forms/applications.py

@@ -1,12 +1,14 @@
 """passbook Core Application forms"""
 from django import forms
 
-from passbook.core.models import Application
+from passbook.core.models import Application, Provider
 
 
 class ApplicationForm(forms.ModelForm):
     """Application Form"""
 
+    provider = forms.ModelChoiceField(queryset=Provider.objects.all().select_subclasses())
+
     class Meta:
 
         model = Application