OS tools refactor

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

test/functional/tests/failover_standby/test_cache_activation_perf.py

@@ -10,7 +10,7 @@ from core.test_run import TestRun
 from test_tools.dd import Dd
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from types.size import Size, Unit
 from storage_devices.disk import DiskType, DiskTypeSet
 from storage_devices.device import Device

test/functional/tests/failover_standby/test_failover_multihost.py

@@ -4,7 +4,6 @@
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
-from time import sleep
 import pytest
 
 from api.cas import casadm
@@ -27,7 +26,8 @@ from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite
 from test_tools.fs_utils import readlink
 from test_utils.drbd import Resource, Node
-from test_utils.os_utils import sync, Udev
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from types.size import Size, Unit
 from test_tools import fs_utils