Set organization UUID in initial migration

We already hard-coded a user UUID in this migration, possibly to facilitate
moving fixtures between development environments. This sets the organization
UUID to a fixed value as well, to facilitate transferring neighborhoods in
a fixture.

scripts/setup

@@ -30,7 +30,7 @@ then
 
         vagrant up --provision
 
-        vagrant ssh -c "cd /vagrant && ./scripts/update"
+        vagrant ssh -c "cd /vagrant && ./scripts/update --load-data"
 
         popd
     fi

src/django/users/migrations/0001_initial.py

@@ -47,6 +47,7 @@ def add_root_org(apps, schema_editor):
     root_org = Organization.objects.create(created_by=root_user,
                                            modified_by=root_user,
                                            name='root',
+                                           uuid='7adf4108-f9e4-4f1f-ae9c-4fccf55d9796',
                                            org_type='ADMIN',
                                            label='Default administrative organization')
     root_org.save()