migrate to per-model UUID Primary key, remove UUIDModel (#26)

* *: migrate to per-model UUID Primary key, remove UUIDModel

* *: fix import order, fix unittests

passbook/stages/prompt/migrations/0001_initial.py

@@ -1,4 +1,4 @@
-# Generated by Django 3.0.5 on 2020-05-14 11:46
+# Generated by Django 3.0.6 on 2020-05-19 22:08
 
 import uuid
 
@@ -11,8 +11,8 @@ class Migration(migrations.Migration):
     initial = True
 
     dependencies = [
-        ("passbook_flows", "0005_auto_20200512_1158"),
         ("passbook_policies", "0001_initial"),
+        ("passbook_flows", "0001_initial"),
     ]
 
     operations = [
@@ -20,7 +20,7 @@ class Migration(migrations.Migration):
             name="Prompt",
             fields=[
                 (
-                    "uuid",
+                    "prompt_uuid",
                     models.UUIDField(
                         default=uuid.uuid4,
                         editable=False,

passbook/stages/prompt/models.py

@@ -1,10 +1,11 @@
 """prompt models"""
+from uuid import uuid4
+
 from django import forms
 from django.db import models
 from django.utils.translation import gettext_lazy as _
 
 from passbook.flows.models import Stage
-from passbook.lib.models import UUIDModel
 from passbook.policies.models import PolicyBindingModel
 
 
@@ -18,9 +19,11 @@ class FieldTypes(models.TextChoices):
     HIDDEN = "hidden"
 
 
-class Prompt(UUIDModel):
+class Prompt(models.Model):
     """Single Prompt, part of a prompt stage."""
 
+    prompt_uuid = models.UUIDField(primary_key=True, editable=False, default=uuid4)
+
     field_key = models.SlugField(
         help_text=_("Name of the form field, also used to store the value")
     )