OS tools refactor

Signed-off-by: Katarzyna Treder <katarzyna.treder@h-partners.com>

test/functional/tests/incremental_load/test_incremental_load.py

@@ -29,7 +29,8 @@ from test_tools.disk_utils import Filesystem
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import IoEngine, ReadWrite
 from test_utils.filesystem.file import File
-from test_utils.os_utils import Udev, sync
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from connection.utils.output import CmdException
 from types.size import Size, Unit
 from types.time import Time