Add basic roundtrip test for domain serializer

Fix dumping and loading compatibility of domain model
Fix (untested) dumping and loading compatibility of account model
Loosen simple name regex requirements

tests/test_serializers_domain.py

@@ -0,0 +1,20 @@
+# pylint: disable=unused-argument,redefined-outer-name,unused-import
+import pytest
+from fixtures import demo_database
+
+from keyosk import database
+from keyosk import serializers
+
+
+def test_roundtrip(demo_database):
+    serializer = serializers.DomainSerializer()
+
+    for domain in database.KeyoskDomain.select():
+        dumped = serializer.dump(domain)
+        assert sorted(dumped["permissions"]) == sorted(
+            [permission.name for permission in domain.permissions]
+        )
+        assert sorted(dumped["access-lists"]) == sorted(
+            acl.name for acl in domain.access_lists
+        )
+        assert domain == serializer.load(dumped)