python 3 updates

- Fix super() calls for python 3
- No need to inherit objects.
- No need for u at the start of strings
- Tidied up some brackets and f-strings too

web/pgadmin/tools/restore/__init__.py

@@ -32,7 +32,7 @@ server_info = {}
 
 class RestoreModule(PgAdminModule):
     """
-    class RestoreModule(Object):
+    class RestoreModule():
 
         It is a utility which inherits PgAdminModule
         class and define methods to load its own

web/pgadmin/tools/restore/tests/test_create_restore_job.py

@@ -16,7 +16,7 @@ import simplejson as json
 from pgadmin.utils.route import BaseTestGenerator
 from regression import parent_node_dict
 from regression.python_test_utils import test_utils as utils
-from pgadmin.utils import server_utils as server_utils, does_utility_exist
+from pgadmin.utils import server_utils, does_utility_exist
 import pgadmin.tools.backup.tests.test_backup_utils as backup_utils
 
 

web/pgadmin/tools/restore/tests/test_restore_create_job_unit_test.py

@@ -12,7 +12,7 @@ import os
 
 from pgadmin.utils.route import BaseTestGenerator
 from regression import parent_node_dict
-from pgadmin.utils import server_utils as server_utils, does_utility_exist
+from pgadmin.utils import server_utils, does_utility_exist
 from pgadmin.browser.server_groups.servers.databases.tests import utils as \
     database_utils
 from unittest.mock import patch, MagicMock