move default country name creation to tokenizer

The new function is also used, when a country us updated. All SQL
function related to country names have been removed.

test/python/test_tools_refresh_create_functions.py

@@ -11,9 +11,7 @@ def sql_tmp_path(tmp_path, def_config):
     return tmp_path
 
 @pytest.fixture
-def conn(temp_db_conn, table_factory, monkeypatch):
-    monkeypatch.setenv('NOMINATIM_DATABASE_MODULE_PATH', '.')
-    table_factory('country_name', 'partition INT', (0, 1, 2))
+def conn(sql_preprocessor, temp_db_conn):
     return temp_db_conn