Have registry tests use a copy of the database

This makes the test suite much faster

test/testconfig.py

@@ -21,6 +21,7 @@ class TestConfig(DefaultConfig):
   TESTING = True
   SECRET_KEY = 'a36c9d7d-25a9-4d3f-a586-3d2f8dc40a83'
 
+  TEST_DB_FILE = TEST_DB_FILE
   DB_URI = os.environ.get('TEST_DATABASE_URI', 'sqlite:///{0}'.format(TEST_DB_FILE.name))
   DB_CONNECTION_ARGS = {
     'threadlocals': True,