Fix imports

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

test/functional/tests/io/trim/test_trim.py

@@ -3,22 +3,20 @@
 # Copyright(c) 2024 Huawei Technologies Co., Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 #
+
 import posixpath
 import time
-
 import pytest
 
-import test_tools.fs_tools
 from test_tools.os_tools import sync, drop_caches
 from test_tools.udev import Udev
 from api.cas import casadm
 from api.cas.cache_config import CacheMode, CacheModeTrait, CleaningPolicy, SeqCutOffPolicy
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet
-from test_tools import fs_tools
 from test_tools.blktrace import BlkTrace, BlkTraceMask, RwbsKind
 from test_tools.disk_tools import check_if_device_supports_trim
-from test_tools.fs_tools import Filesystem
+from test_tools.fs_tools import Filesystem, create_random_test_file
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
 from type_def.size import Size, Unit
@@ -230,14 +228,14 @@ def test_trim_device_discard_support(
         cache = casadm.start_cache(cache_dev, cache_mode, force=True)
         cache.set_cleaning_policy(cleaning_policy)
 
-        test_tools.fs_utils.create_filesystem(filesystem)
+        core_dev.create_filesystem(filesystem)
         core = cache.add_core(core_dev)
 
     with TestRun.step("Mount filesystem with discard option."):
         core.mount(mount_point, ["discard"])
 
     with TestRun.step("Create random file."):
-        test_file = fs_utils.create_random_test_file(
+        test_file = create_random_test_file(
             posixpath.join(mount_point, "test_file"), core_dev.size * 0.2
         )
         occupancy_before = core.get_occupancy()

test/functional/tests/io/trim/test_trim_stress.py

@@ -1,11 +1,14 @@
 #
 # Copyright(c) 2020-2022 Intel Corporation
+# Copyright(c) 2024 Huawei Technologies Co., Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
 import os
-from datetime import timedelta
 import pytest
+
+from datetime import timedelta
+
 from api.cas import casadm
 from api.cas.cache_config import CacheMode, CacheLineSize
 from core.test_run import TestRun