Filter out deleted users and organizations from the superuser list

Superusers were getting confused because the users/orgs were being disabled and renamed, but still appeared in the list until they were GCed by the background worker. Now we just hide them.

Fixes https://jira.coreos.com/browse/QUAY-936

data/model/test/test_organization.py

@@ -0,0 +1,22 @@
+import pytest
+
+from data.model.organization import get_organization, get_organizations
+from data.model.user import mark_namespace_for_deletion
+from data.queue import WorkQueue
+from test.fixtures import *
+
+@pytest.mark.parametrize('deleted', [
+  (True),
+  (False),
+])
+def test_get_organizations(deleted, initialized_db):
+  # Delete an org.
+  deleted_org = get_organization('sellnsmall')
+  queue = WorkQueue('testgcnamespace', lambda db: db.transaction())
+  mark_namespace_for_deletion(deleted_org, [], queue)
+
+  orgs = get_organizations(deleted=deleted)
+  assert orgs
+
+  deleted_found = [org for org in orgs if org.id == deleted_org.id]
+  assert bool(deleted_found) == deleted